Question

find the value of cos 270°​

Answer 1

Value is 0°

Cos 270° = 0°

PLEASE SEE MY ATTACHMENT

Answer 2

Answer:

Value is 0

Step-by-step explanation:

cos270∘

=cos(180∘+90∘)

180∘+θ is in third quadrant.By ASTC rule, cosθ is negative in third quadrant.

Hence cos(180∘+60∘)=cos90∘=0

Hope it helps you