1.

Tan4 thita +tan 2 thita=sec4 thita-sec2thita​

Answer»

Step-by-step EXPLANATION:

LHS:

sec

4

θ−sec

2

θ

=sec

2

θ(sec

2

θ−1)

=(1+TAN

2

θ)tan

2

θ

=tan

2

θ+tan

4

θ

Hence LHS = RHS.



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