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Mathematics
Problem
Which of the following expressions is identically equal to
sin
2
θ
\sin 2\theta
sin
2
θ
? a)
cos
2
θ
\cos 2\theta
cos
2
θ
b)
sin
θ
cos
θ
\sin\theta\cos\theta
sin
θ
cos
θ
c)
2
sin
θ
cos
θ
2\sin\theta\cos\theta
2
sin
θ
cos
θ
d)
sin
2
θ
+
cos
2
θ
\sin^{2}\theta+\cos^{2}\theta
sin
2
θ
+
cos
2
θ
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