Question

(d) prove that pl3ase​

Answer 1

=(sin(a-b)^2)+(cos(a-b)^2)

=sin^2(a-b)+cos^2(a-b)

=1

Answer 2

Answer:

Step-by-step explanation:

using

sin(α-β) = sinα.cosβ - cosα.sinβ

cos(α-β) = cosα.cosβ - sinα.sinβ

sin²(α-β) + cos²(α-β) = 1