In the same way, we can derive other values of sin degrees like 0°, 30°, 45°, 60°, 90°,180°, 270° and 360°. Make the expression negative because sine is negative in the third quadrant . A tree casts a shadow 210 feet long. Favourite answer . View Answer. Below is the trigonometry table, which defines all the values of sine along with other trigonometric ratios. Underneath the calculator, six most popular trig functions will appear - three basic ones: sine, cosine and tangent, and … Sine calculator. cos 210 degrees is -sqrt 3/ 2 and sin 210 is 1/2, but why is cos 210 a negative number while sin 210 is a positive number? The Trignometric Table of sin, cos, tan, cosec, sec, cot is useful to learn the common angles of trigonometrical ratios from 0° to 360°. Sin Values. Therefore, sin 30 value is 1/2. As we know, tan is the ratio of sin and cos, such as tan θ = sin θ/cos θ. I'm very confused with Trig. 1 decade ago. However, 210 degrees puts you in the third quadrant, on the left of the y-axis where cosine values are negative, so In order to calculate sin(x) on the calculator: Enter the input angle. Example "negative y axis". So Sin^2 10 + Sin^2 80 = 1 and so on till sin50 = cos40 .. .. .. Sine, is a trigonometric function of an angle. Find the height of the tree if the angle of elevation of the sun is 60 degrees. Sine 210° Value in Radians / Degrees | Sine Values for 210° Use this simple sine calculator to calculate the sine value for 210° in radians / degrees. Since it is in the 4th quardrant, it has a negative sign. Question 49744: cot 60 degrees tan 210 degrees sec 210 csc 210 cot 210 cos 11pi/6 cot 3pi/2 tan 2pi/3 csc 5pi/6 please help if anyone can do it i need it by thursday … The sine of an angle is defined in the context of a right triangle: for the specified angle, it is the ratio of the length of the side that is opposite that angle to (which divided by) the length of the longest side of the triangle (thatis called the hypotenuse). But 210 degrees is in the 3rd quadrant, where only tan is positive. No decimals please. Use our sin(x) calculator to find the exact value of sine of -210 degrees - sin(-210 °) - or the sine of any angle in degrees and in radians. Find sin 270^@ On the trig unit circle, sin (270) = sin (90 + 180) = - sin 90 = - 1 What is value of sin 30?What about cos 0?and sin 0?How do we remember them?Let's learn how. First find (cos 15). So Sin^2 5 + Sin^2 85 = 1 Sin80 = cos10.. .. .. .. with explanations? The cotangent is the cosine divided into a sine. Big sine table in degrees and in radians from 0 to 360 degrees with 0.5 degrees steps. Free math problem solver answers your algebra, geometry, trigonometry, calculus, and statistics homework questions with step-by-step explanations, just like a math tutor. The values of sin, cos, tan, cot at the angles of 0°, 30°, 60°, 90°, 120°, 135°, 150°, 180°, 210°, 225°, 240°, 270°, 300°, 315°, 330°, 360° Trigonometry Right Triangles Trigonometric Functions of Any Angle. 2 Answers Nam D. Mar 28, 2018 #sin45^@=sqrt(2)/2# Explanation: This is a common value, in which #sin45^@=1/sqrt2#. Answer to: Find the cosine and sine of 210 degrees. 360 - 330 = 30, so we are subtracting 30 degrees from 360 to get the sin inverse, 330. So sin 210 = -0.5, cos 30 = -root3 / 2 and tan 30 = root 3/ 3. Select degrees or radians in the drop down box and calculate the exact sine 210° value easily. sin 0° = √(0/4) = 0. sin 30° = √(1/4) = ½. sin 45° = √(2/4) = 1/√2 Lv 5. How do you find the trigonometric functions of any angle? so finally answer = -1/2 Relevance. Its a real number and has unlimited digits. We will discuss what are different values ofsin, cos, tan, cosec, sec, cotat0, 30, 45, 60 and 90 degreesand how to memorise them.So, we have to fill this tableHow to … Draw an xy grid with positive and negative x's and y's. Oct 16, 2015 #-sqrt3/2# Explanation: By using the #180^@# rule together with special triangle values, we get. #cos210^@=cos(180^@+30^@)=-cos30^@=-sqrt3/2# Answer link. Thanks in advance. 4 Answers. Use of calculator to Find the Quadrant of an Angle 1 - Enter the angle: in Degrees top input. Additionally, for cos(210), you know the reference angle is 30 degrees since 210-30=180 and 180 degrees is the x-axis, so for cos(210) you can look at a 30-60-90 triangle to see that cos(30) = sqrt(3)/2. Press the = button to calculate the result. Give me best answer. Make the expression negative because sine is negative in the third quadrant . Also, know the values of cosine and tangent ratios from BYJU'S. Know Sin 45 degrees value along with other degree values like 0, 30, 45, 90, 180, 270 and 360. Select degrees … Well 360-330=30 degrees and the sin of 30 degrees is 1/2 or .5. Thus, we can get the values of tan ratio for the specific angles. how to find sin(-210) degrees without a calculator? By signing up, you'll get thousands of step-by-step solutions to your homework questions. The Trignometric Table of sin, cos, tan, cosec, sec, cot is useful to learn the common angles of trigonometrical ratios from 0° to 360°. 0 0. What are the relations among all the trigonometrical ratios of (180° - θ)? Related questions. Anonymous. Call cos 15 = cos x Apply the trig identity: cos 2x = 2cos^2 x - 1. cos 2x = cos (30) = sqrt3/2 = 2cos^2 x - 1 2cos^2 x = 1 + sqrt3/2 = (2 + sqrt3)/2 cos^2 x = (2 + sqrt3)/4 cos x = cos 15 = (sqrt(2 + sqrt3)/2. Relevance. I can tell you there is no exact answer to sine (20 degrees) (I assume you want degrees, not the usual mathematical radians). Favorite Answer. Find exact values for: sin (2 theta) View Answer. Find the Exact Value sin(240) Apply the reference angle by finding the angle with equivalent trig values in the first quadrant . Sin85 = Cos5 .. .. .. .. it will be best if you can show me why it is that way. Answer Save. 1 Answer Trevor Ryan. We take mathematics in hand and we check. 7 years ago. Find the Exact Value cos(210) Apply the reference angle by finding the angle with equivalent trig values in the first quadrant . Why do people use the word exact so casually. (since cos 15 is positive) sin (105) = cos (15) = sqrt(2 + sqrt3)/2. Select angle type of degrees (°) or radians (rad) in the combo box. To find the trigonometric functions of an angle, enter the chosen angle in degrees or radians. example 1250 in Radians second input as a fraction of π: Example 27/5 π or 1.2 π then press the button "Find Quadrant" on the same row. Answer Save. If you enter a quadrantal angle, the axis is displayed. Sine Calculator. So Sin^2 40 + Sin^2 50 = 1 Sin90 = 1 sin^2 45 = 1/2 Thus the series sums up to 9.5 Use our sin(x) calculator to find the exact value of sine of 210 degrees - sin(210 °) - or the sine of any angle in degrees and in radians. Values of a sine and cosine of 30 and 210 degrees can be taken here. How do you find the value of #cos 210#? Answer must be in sqrt form or fraction. Here I have applied sin(-x) = -sin(x) identity to find the value of sin -210. We can now rationalize the fraction, which comes out to: #1/sqrt2*1/1# #=1/sqrt2*(sqrt(2))/sqrt2# #=sqrt(2)/2# Answer link. sin(11pi/6) = −1/2. Sin 30° = 1 / 2. So, -210 is in the second quadrant, which means sin(-210) will be positive, and the reference angle for -210 is 30, sin(30)=1/2, therefore, sin(-210)=1/2. … The associated acute angle of 210 degrees is 30 degrees [because 210 - 30 = 180, which lies on the negative x-axis]. sin 30° = 1/2 herleiten im Mathe-Forum für Schüler und Studenten Antworten nach dem Prinzip Hilfe zur Selbsthilfe Jetzt Deine Frage im Forum stellen! Answer: 1/2. Now, write the values of sine degrees in reverse order to get the values of cosine for the same angles. This means that sin is negative. How do you find the exact value of sin 45 degrees? Value of a cotangent of 210 degrees same, as at a cotangent of 30 degrees. The given angle may be in degrees or radians. Trig calculator finding sin, cos, tan, cot, sec, csc. Therefore, Sin 30 degree equals to the fractional value of 1/ 2. Description:In this video, we learn to find the value of sin(-210). 5 Answers. Trigonometric sine calculator. sin 30 = 0.5, cos 30 = root3 / 2, tan 30 = root3 / 3. The easiest way to go about doing this (with the least work possible) is to subtract a sin value from 360 degrees (as to not have to switch the trigonometric ratio being used). Make the expression negative because cosine is negative in the third quadrant . Find exact value of sin (105) Ans: (sqrt(2 + sqrt3)/2) sin (105) = sin (15 + 90) = cos 15. Trigonometry Right Triangles Trigonometric Functions of Any Angle. Mr. X. Mar 28, 2018 The exact value … WhatWasThatNameAgain? Evaluate sin(210 degrees ) Apply the reference angle by finding the angle with equivalent trig values in the first quadrant . -{Sin[30 Degree], Cos[30 Degree]} == {Sin[210 Degree], Cos[210 Degree]} In trigonometrical ratios of angles (180° - θ) we will find the relation between all six trigonometrical ratios. Tan 210° Value in Radians / Degrees | Tan Values for 210° Use this simple tan calculator to calculate the tan value for 210° in radians / degrees.

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