Question

How do you use the fundamental identities to simplify `sinbetatanbeta+cosbeta`?

Answer 1

sec b

Explanation:

`f(b) = sin b.tan b + cos b = (sin b)(sin b)/(cos b) + cos b =`
`= (sin^2 b + cos ^2 b)/(cos b) = 1/(cos b) = sec b`