Question

Can I have a step by step on this? Its for a friend and we are both so confused on how to do it.
(see below)

Answer 1

6) multiply each side by the lowest common denominator for the fractions.
make y the subject y =
remember whatever you do to one side also do to the other

Answer 2

9) pythagorean theorem a^2 + b^2 = c^2 where c is the length of the hypotenuse and a and b are the legs of a right angle triangle

Answer 3

the rest you need your basic trig ratios
Sin = opposite/hypotenuse, Cos = adjacent/hypotenuse and Tan = opposite/adjacent