Originally Posted by

**Lee66** Hi all,

Can someone help with the following question please?

Solve 5 sin (θ – Π/6) = 8 cos θ for values 0 < θ < 2Π

To begin (using the compound angle formulae), I have:

5 sin (θ – Π/6) = 5 [sinθ cos Π/6 – cosθ sin Π/6]

The trouble is that when I expand the expression I start to get complicated decimal numbers, whereas I wish to maintain Π in the answers, which I want to give in radians not degrees.

Can anyone help please, or offer an explanatory website that will assist me.

Thanks.