7/8•1/2??? I can’t do it in my head put it in fraction from please

Can someone me with #s 8, 9, and 11. with just one of the three also works. prove using only trig identities.

Askateboard ramp is in the shape of a right triangle what is the height of the ramp

Using the figure below, select the two pairs of alternate interior angles.a: point 1 and point 4 b : point 2 and point 3 c: point 6 and point 6d: point 5 and point 7