If sin theta=3/5,
then find:
1. sin2 theta
2. cos2 theta
do you mean sin(2θ) or sin^2(θ) ?
Anyway, if sinθ = 3/5, then cosθ = 4/5
The, if you want sin(2θ) just use your double angle formula.
then find:
1. sin2 theta
2. cos2 theta
Anyway, if sinθ = 3/5, then cosθ = 4/5
The, if you want sin(2θ) just use your double angle formula.