Algebra
posted by Lavanda .
Find the complete solution of each equation. Express your answer in degrees.
sec^2 θ+sec θ=0
2 cos^2 θ+1=0
cot θ=cot^2 θ
sin^2 θ+5 sin θ=0

1/cos^2 + 1/cos = 0
1 + cos = 0
cos = 1
angle = 180 deg or pi radians
cos^2 = 1/2
impossible, square of real number is positive