If `sin^4 A + sin^2 A=1` then prove that `1/(tan^4A)+1/(tan^2A)=1`

To ask Unlimited Maths doubts download Doubtnut from - https://goo.gl/9WZjCW If `sin^4 A + sin^2 A=1` then prove that `1/(tan^4A)+1/(tan^2A)=1`