Hello, could you help me with these two questions please? I've tried to do them myself but I just can't get my head around them.
PS π is pie
First question:
The tangent to the curve y=2xtanx at the point where x=π/4 meets the y-axis at the point P.
Find the y-coordinate of P in the form kπ² where k is a rational constant to be found.
Second question:
Show that sin(x+30) + sin(x-30) = asinx where a is a constant to be found.
Thank you very much in advance.