Question

(Sec thita + tan thita) (1-sin thita=cos thita)

Answer 1

Answer:

Step-by-step explanation:

sec(theta)+tan(theta) can be written as

1+sin(theta)/cos(theta)

therefore

(1+sin(theta))/cos(theta)*(1-sin thita) is

cos^2(theta)/cos^(theta)

which is cos(theta)

hence proved