Question

Write the value of `(1+ tan^2 theta ) ( 1+ sin theta ) ( 1- sin theta)`

Answer 1

`(1+ tan^2 theta )(1+ sin theta )(1- sintheta)`

    =` sec^2 theta (1- sin^2 theta )`

    =`1/ cos^2 theta xx cos^2 theta`

    = 1