**How To Find Exact Value Of Trig Functions Using Unit Circle**. You can use the double angle identity c o s ( 2 x) = 2 c o s 2 ( x) − 1 to find c o s ( 22.5 o) by choosing x = 45 o. The other side of the angle will meet the circle at p(x,y).

Complete the following table of values for the function.+=cos (+). Use special triangles or the unit circle. Draw the angle, look for the reference angle.

### How To Find The Exact Trigonometric Values:

Unit circle trigonometry definitions of the six trigonometric functions definitions of the six trigonometric functions we will soon learn how to apply the coordinates of the unit circle to find trigonometric functions, but we want to preface this discussion with a more general definition of the six trigonometric functions. In other words, we’re going to do the exact same thing we did when we learned the unit circle, just in reverse! How to find the exact trigonometric values:

### The Other Side Of The Angle Will Meet The Circle At P(X,Y).

You can get s i n ( 15 o) by using the sin angle addition formula s i n ( x + y) = s i n ( x) c o s ( y) + c o s ( x) s i n ( y) and choosing x = 45 o. You can find exact trig functions by typing in (for example) cosecant 135 degrees into any search engine. Complete the following table of values for the function.+=cos (+).

### Use Special Triangles, The Unit Circle, Or A Calculator To Find Values For The Function At 30°=5 6 Radian Intervals.

Calculating exact values of sin, cos, tan without a calculator. Then, we will learn how to find the exact value of an inverse trig function without using a calculator by using the unit circle, reference triangles, and our trigonometric identities. You can use the double angle identity c o s ( 2 x) = 2 c o s 2 ( x) − 1 to find c o s ( 22.5 o) by choosing x = 45 o.

### Find Exact Value Of Trigonometry Functions Using The Unit Circle.

This lesson reviews how to determine terminal points, reference numbers and exact values of trig functions using the unit circle. Use special triangles or the unit circle. You can find exact trig functions by typing in (for example) cosecant 135 degrees.

### You Can Use The Double Angle Identity C O S ( 2 X) = 2 C O S 2 ( X) − 1 To Find C O S ( 22.5 O) By Choosing X = 45 O.

How to find exact value of trig functions using unit circle draw a unit circle radius 1 sketch a 60 degree angle in the 1st quadrant with one side on the x axis. How to find exact value of trig functions using unit circle sketch a line segment from p perpendicular to the +x. Draw the angle, look for the reference angle.