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Mathematics
Mathematics
Problem
The expression
1
1
+
tan
2
θ
\dfrac{1}{1+\tan^2\theta}
1
+
tan
2
θ
1
is equal to a)
cot
2
θ
\cot^2\theta
cot
2
θ
b)
cos
2
θ
\cos^2\theta
cos
2
θ
c)
sin
2
θ
\sin^2\theta
sin
2
θ
d)
sec
2
θ
\sec^2\theta
sec
2
θ
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