The exact value of cos (45°) is √ (2) / 2. If an angle in a right triangle has measure α, then the cosine of that angle, or... See full answer below.

Answer to: Find the exact value of the trigonometric function. Use unit circle. cos 45 degrees By signing up, you'll get thousands of step-by-step...

There are six identities in trigonometric that is sin, cos, tan, csc, cot, a n d sec It has a set of properties or formulas. Here, we are using the sum to product formula of the identities sine and cosine.

Answer to: Use a diagram to explain why \sin (135) = \sin (45), but \cos (135) \neq \cos (45). By signing up, you'll get thousands of step-by-step...

The trig function cos (2x) is related to cos (x), where the angle x is multiplied by 2. The cos (2x) identity can be shown either by graphing cos (2x) on an x-y plot or by using the cos (2x) formula.

Answer to: Evaluate the product for the following using a sum or difference of two functions. cos (45 degrees) cos (15 degrees) By signing up, you'll...

In trigonometry, the unit circle has different standard angles such as 0 ∘, 30 ∘, 45 ∘, 60 ∘, 90 ∘ etc. in each quadrant, where is angle corresponds to a point and its x and y co-ordinates give the values of …

Answer to: Find the exact value of the following. a. cos 315 degrees. b . sin 240 degrees. c. cot 315 degrees. d. csc 225 degrees. By signing up,...

For a given complex expression, z = r (cos θ + i sin θ), the n t h power of the expression is z n = r n (cos θ + i sin θ) n. Here, i is an imaginary number such that i 2 = − 1 and (r, θ) are polar coordinates. …

Learn how to find missing side lengths in a 45-45-90 triangle, and see examples that walk through sample problems step-by-step for you to improve your math knowledge and skills.