Use the fundamental identities to find the value of the trigonometric function.
-cos (-283°)and sin (-283°)
A)negative and positive
B)positive and negative
C)negative and negative
D)positive and positive

Question

Quizplus · Accepted Answer

Cosine is an even function, so cos(-θ) = cos(θ), and sine is an odd function, so sin(-θ) = -sin(θ). Since -283° is in the fourth quadrant, cos(-283°) is positive and sin(-283°) is positive.

Use the Fundamental Identities to Find the Value of the Trigonometric