Which of the following are identities? Check all that apply. A. 1-tan^2 x/2tan x = 1/tan2x B. (Sing-cosx)^2 = 1 + sin2x C. Sin8x = 2sin 4xcos4x D. Sin x + sin5x/ cosx + cos5x

Aman is 6 feet 3 inches tall. the top of his shadow touches a fire hydrant that is 13 feet 6 inches away. what is the angle of elevation from the base of the fire hydrant to the top of the man's head?

Jamie went to home depot.she bought 25 bags of soil that cost $9 per bag.she bought 15 pots at $8 each,and she bought 23 bags of pebbles at $15 each.she used a coupon that gave her $5 off for every 100 dollars she spent.how much did jame pay at the end?

Which steps could be part of the process in algebraically solving the system of equations, y+5x=x^2+10 and y=4x-10