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Mathematics
Mathematics
Problem
Simplify
1
−
tan
2
θ
1
+
tan
2
θ
\dfrac{1-\tan^2\theta}{1+\tan^2\theta}
1
+
tan
2
θ
1
−
tan
2
θ
. a)
−
cos
2
θ
-\cos 2\theta
−
cos
2
θ
b)
sin
2
θ
\sin 2\theta
sin
2
θ
c)
cos
2
θ
\cos 2\theta
cos
2
θ
d)
tan
2
θ
\tan 2\theta
tan
2
θ
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