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Simplify
sinθcos2θ−sinθ. \sin \theta \cos ^2 \theta - \sin \theta . sinθcos2θ−sinθ.
1sin2θ+1cos2θ.\displaystyle \frac{1}{\sin^2 \theta}+\frac{1}{\cos^2 \theta}. sin2θ1+cos2θ1.
tan2θtan2θ+1. \frac{ \tan ^2 \theta } { \tan ^2 \theta + 1 } . tan2θ+1tan2θ.
Which of the following is equal to the above expression?
cos4θ+sin2θcos2θ. \cos ^4 \theta + \sin^2 \theta \cos^2 \theta. cos4θ+sin2θcos2θ.
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