Question

\frac { 1 + \sin ^ { 4 } \theta } { \cos ^ { 4 } \theta } = 1 + 2 \tan ^ { 2 } \theta \cdot \sec ^ { 2 } \theta cos 4 θ 1+sin 4 θ ​ =1+2tan 2 θ⋅sec 2 θ​

Answer 1

Answer:

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