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Mathematics
Mathematics
Problem
Which of the following is equal to
sin
2
θ
+
cos
2
θ
\sin^2\theta + \cos^2\theta
sin
2
θ
+
cos
2
θ
for all real
θ
\theta
θ
? a)
cos
2
θ
\cos 2\theta
cos
2
θ
b) 1 c)
sin
2
θ
\sin 2\theta
sin
2
θ
d)
sec
2
θ
\sec^{2}\theta
sec
2
θ
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