solve the following

Question

E= (tan A) (sec ^2 A) (cos^3 A)/ sin A

Answer 1

tan(A) = sin(A)/cos(A)

sec(A) = 1/cos(A) so sec²(A) = 1/cos²(A)

Substituting those into the given equation:

you can see that everything cancels out so E = 1