(sin α + cos α) (tan α + cot α) = sec α + cosec α

3

If tan A=, then sin A. cos A=.

3

If tan A=, then sin A. cos A=.

4

(sin α + cos α) (tan α + cot α) = sec α + cosec α

5

(3-cot30⁰)=tan³60⁰-2sin60⁰