# Precalculus

posted by
**Melissa**
.

Consider the equation 7sin^2x - (4sin2^x)/cosx = -1

a) Put the equation in standard quadratic trig equation form.

Why is it 7sin^2x - 8sinx + 1 =0?

posted by
**Melissa**
.

Consider the equation 7sin^2x - (4sin2^x)/cosx = -1

a) Put the equation in standard quadratic trig equation form.

Why is it 7sin^2x - 8sinx + 1 =0?