I will not solve these for you, but I will tell you how to do them.

In the first one, 1+ tan^{2}x = sec^{2}x will resolve the sequation to a quadratic in sec x.

In the 2nd one sin^{2}x + cos^{2}x = 1 will resolve the equation to a quadratic equation in cos x.

Paul M.

03/26/21

Ali A.

Appreciate the guidance. Thank you03/26/21