If sec x= cos x + sin x,
show that cos 2x = tan^2 [90 - x]

me with my question.

What is the rotational symmetry of a wheel

Name these type of angles shown check all that applies

The chs baseball team was on the field and the batter popped the ball up. the equation b(t)=80t-16•16+3.5 represents the height of the ball above the ground in feet as a function of time in seconds. how long will the catcher have to get in position to catch the ball before it hits the ground? round to the nearest second