Question

Given that cos75º 0.259, which statement below

is also true?

A. sin15º = 0.259
B. sin75° =0.259
C. sin15º = 0.966
D. cos15° =0.259

Answer 1

Alright, lets get started.

Please take a look at the diagram attached.

The reference angle of 75 will be 75

As it is mentioned that the angle intersects the unit circle means r = 1

So, finding cos

cos 75 =
`(X)/(r)`

cos 75 =
`(0.259)/(1)`

cos 75 = 0.259 is the Answer

Hope it will help :)

Answer 2

answer: A. Sin15 = 0.259