hey, just need some help on my homework.
First, how would I make a table for a graph of the equation y = -2sin2x. I used 0, pi/2, pi, 3pi/2, 2pi as the x values, but everything equals 0
Second, I have a sheet that says the formulas for double angles, half angles, difference of two angles, etc. nothing with tan though. how would i answer the question "If A and B are acute angles such that cos A = 24/25 and tan B = 15/8, find the exact value of sin(A - B)"
Last question. This one has tan too. the question is "The Double Angle formula for the tangent is: tan2x = (2tanx)/(1-tan^2x). Derive this formula from the formulas for sin2x and cos2x"