Given that sin(90 -5ϴ) = Cos(180 - ϴ), Find the value of ϴ

The ratio pv to nrt is plotted against pressure for ch4 at 0°c and 200°c. why does the curve for 0°c drop below the horizontal line for an ideal gas whereas the curve for 200°c does not?

He that is measured at 220° is a reflex angle. the opposite angle is obtuse. find the measure of obtuse .

1. a parachutist is 800 feet above the ground when she opens her parachute. she then falls at a constant rate of 5 feet per second. select the equation that represents this situation. h = -800t + 5 y = -5x + 800 h = 5t - 800 y = 800x + 5 i need