this one will factor ...1.) Find all the radian solutions for the following equation: 4sin^2 x - 1=0

use the zero product property and solve for x.

hint ...2.) Simplify the following expression by using a double-angle formula or a half-angle formula: 1-2sin^2 (x/12)

if and , then ...3.) Find the quotient z1/z2 in trigonometric form, if z1=cos(pi) +i sin(pi)and z2=5cos(pi/2) + 5i sin(pi/2)