Hi, this is a bit embarrassing but I'm a bit rusty with this stuff.

My first question:

a) If sin(a°) = 0.951, then what is tan a equal to?

The answer is 3.076 according to the book, however i'm not sure how this conclusion is reached? If someone could explain that'd be nice.

Question 2:

If 0°<a<90° and cos a<0.5, then which of the following is correct?

A. a<30° B. a>30° C. a<60°

D. a<45° E. a>60°

Once again, no idea on how to go about this and need clearing up. Do any of these questions relate to :

tan(x) = sin(x) / cos(x)

or

sinē(x) + cosē(x) = 1

Thanks.