For the graph shown, find (a)AB to the nearest tenth and (b) the coordinates of the midpoint —
AB
Please help show me how to solve this

Prove sin2a + cos2a - 1 / sin2a + cos2a + 1 = 1 - tana / 1 + cota

An unknown number x is at most 10. which graph best represents all the values of x? number line graph with closed circle on 10 and shading to the right. number line graph with open circle on 10 and shading to the right. number line graph with open circle on 10 and shading to the left. number line graph with closed circle on 10 and shading to the left.

What rule describes a dilation with a scale factor of 4 and the center of dilation at the origin?