Arturo O. answered • 07/10/18
Tutor
5.0
(66)
Experienced Physics Teacher for Physics Tutoring
Use the identity
sin2θ = 2cosθ sinθ
2cosθ sinθ = sinθ
If sinθ ≠ 0,
2cosθ = 1
cosθ = 1/2
θ = 60°
If sinθ = 0, then θ = 0°
Test the answers.
Arturo O.
Over the given interval, yes. But test the answer.
Is sin2θ = sinθ ?
Test this for both 0° and 60°.
Report
07/10/18
Yousef R.
b) 30°, 60° d) 0°, 60
07/10/18