Answer:
[tex]\huge\boxed{\sf -sin \theta}[/tex]
Step-by-step explanation:
Given expression:
= cos (270 - θ)
We can write 270 as 180 + 90
= cos (180 + 90 - θ)
= cos {(180 + (90 - θ)} (cos 180 = -1)
= -1 {cos (90 - θ)} (cos (90 - θ) = sin θ)
= -1(sin θ)
= -sin θ
I think there is some problem in the options.
[tex]\rule[225]{225}{2}[/tex]
Hope this helped!
~AH1807
