Question

Sin thita = m2 - n2 / m2+ n2 find ten thita

Answer 1

sin thita=m2-n2/m2+n2 = perpendicular/ hypotenus


By Pythagoras theorm
A2+B2=C2
(m2-n2)2 + (x)2 = (m2+n2)2
calculate x
By calculation we get x=2mn

cos Thita = 2mn/m2+n2

tan= sin/cos = m2-n2/2mn