Given that LJ=42,LK=49, and LN=21, find LM

If cos(2x) = tan^2(y), show that cos(2y) = tan^2(x).

Find the length of the normal and the angle it makes with the positive x-axis. (see pictured below)

The equation y= -16t^2+120 can be used to represent the fridge height above the ground where ti represents time in seconds after she threw the apple how long does it take the apple to hit the ground running your