PLZ HELP use trigonometric identities to verify each expression is equal.

c) csc2(x) – 2csc(x)cot(x) + cot2(x) = tan2 (pi/2)

What signals you that factoring by grouping is the best method to use when factoring a problem?

You have a 32-foot fence around a square garden. there are 4 equal sections. you paint 13 of one section of the fence. what fraction of the fence did you paint? you have a 32-foot fence around a square garden. there are 4 equal sections. you paint 13 of one section of the fence. what fraction of the fence did you paint?

How does reflecting or rotating a figure change the interior angles of the figure?