Question

Verify each trigonometric equation by substituting identities to match the right hand side of the equation to the left hand side of the equation.

Answer 1

\[-\tan^2 x +\sec^2 x =1\]

Answer 2

you have 1+ tan^2 = sec^2 ---> 1- sec^2 = - tan^2
replace to original one you have 1-sec^2 + sec^2 = 1 . that's it