Question

Prove the identity sin^2A + cos^2A = 1

Answer 1

Answer:

sin^2 + Cos^2 = 1

LHS = Sin^2 +Cos^2

= P^2/H^2+B^2/ H^2

= P^2+B^2 //H^2

= H^2/ H^2. by pythagoras theorum

= 1. = RHS proved