Learn how to evaluate the half angle for sine in radians

[@nebyuyishak8897]

Thanks this really helped my math teacher doesnt even are about my eduction and he does teach me properly

[@brianmclogan]

sorry to hear but happy to be able to help you out!

[@connormurphy1964]

I have a Precalc question. "p" and "-p" represent the distance between what in a parabola? also what does "a" represent the distance between in a hyperbola? Thanks for any response

[@brianmclogan]

c is the distance from the center to the foci for an ellipse and hyperbola

[@hairyDickerson]

why do i use the reference angle

[@HusenMohammed-v1r]

You are father of maths