Question

Please help!!!!!!!!!!!!!!!!!

Answer 1

Note.... sin (-θ) = -sin(θ)

And tanθ =√15 / 15 = 1 / √15

So
-sin (θ) = -1/4 ⇒ sin (θ) = 1/4

And

tan (θ) = sin (θ) / cos(θ) rearrange as

cos (θ) = sin (θ) / tan (θ) = (1/4) / (1/ √15) = (1/4) * (√15 / 1) = √15 / 4 ⇒ C