Question

Write the following expression as a function of a positive acute angle. cos 215

Answer 1

Answer:

- cos 35°

Step-by-step explanation:

215° is in the third quadrant where cos is negative

cos 215° = - cos( 215 - 180)° = - cos 35°

Answer 2

Answer:

- cos 35°

Step-by-step explanation:

215° is in the third quadrant in which cos is negative

cos 215°

cos(α - 180°) = - cos theta

-cos( 215 - 180)°

- cos 35°

hope it helps:)

mark brainliest!