Question

Verify [cos(x)/1+sin(x)] - [cos(x)/1-sin(x)] = -2tan(x)

Answer 1

L.H.S = R. H.S

Explanation:

Hope, you see the image .

Note; Way to solve question may vary according to your grade

This process is for grade 9 and above

For lower level you can express all tri.. ratios in p , b & h and prove it