Question

Pls show how you found the answer.​

Answer 1

B

Explanation:

`tan^(2)\alpha (sec^(2) \alpha + cosec^(2) \alpha )\\(sin^(2)\alpha)/(cos^(2)\alpha) ((1)/(cos^(2)\alpha)+(1)/(sin^(2)\alpha))\\ (sin^(2)\alpha)/(cos^(2)\alpha) ((1)/(cos^(2) \alpha . sin^(2)\alpha) )\\(1)/(cos^(4)\alpha)\\= sec^(4)\alpha`