The left side can be rewritten
= (1 + sin theta]/cos theta
Crossmultiply
cos^2 theta = 1 - sin^2 theta
That is an identity
verify the identity:
sec(beta)+ tan (beta)= cos(beta)/ 1-sin(beta)
1 answer
sec(beta)+ tan (beta)= cos(beta)/ 1-sin(beta)
1 answer