Question

if sinΦ=1/2 find the value of sin²Φ_cos²Φ

Answer 1

sin theeta = opp/hyp=1/2

then by Pythagoras theorem

(hyp)square=(opp)square+(adj)square

2square=1square+adjsquare

4=1+x

x=3,then

sin square theeta=1/4

cos square theeta=9/4

1/4-9/4 = -8/4 = -2