Question

Sec^2 2 alpha = 1 - tan 2 alpha

Answer 1

Answer:

sec^2 2alpha=1+tan ^2 2alpha

then LHS=1-tan^ alpha

then tan ^2 2 alpha=-tan^2alpha

then use Double angle Formulas for LHS

Step-by-step explanation:

4 tan^2 Alpha/((1-tan^2 alpha)^2)

then tan ^2 alpha =0

or 1 + tan^4 alpha - 2 tan ^2 alpha+ 2tan^2 alpha = 0

then you find that

tan ^2 alpha = -1

it is not possible so the answer is( n phi)