Question

If cos α = p, 0 ≤ α ≤ 90° find the value of
a. Cos^2α - sin^2α
b. 1 - cot^2α

Answer 1

Answer:

(a) cos^2a-sin^2a

cos^2a =1-sin^2a

sin^2a+cos^2a= 1

and

(b) 1-cot^2

cosec^2a- cot^2a= 1

cosec^2a = 1+ cot ^2a