Write the trigonometric expression in terms of sine and cosine, and then simplify. sin ? sec ?

Question

help please

Answer 1

Since secant = 1/cosine, you can replace secθ with 1/cosθ:

 

sinθsecθ = sinθ(1/cosθ) = sinθ/cosθ

 

Since sine/cosine = tangent, this is equal to tanθ.