Question

Find value of 5 sec^2 tita - 5 tan^2 tita​

Answer 1

Well,  $\sec^2\theta-\tan^2\theta=1.$

So,  $5\sec^2\theta-5\tan^2\theta=5(\sec^2\theta-\tan^2\theta)=5\cdot1=\mathbf{5}$