cos^4(0)+cos^2(0)sin^2(0)=1

Solution for cos^4(0)+cos^2(0)sin^2(0)=1 equation:

Simplifying
cos4(0) + cos2(0) * sin2(0) = 1

Reorder the terms for easier multiplication:
0cos4 + cos2(0) * sin2(0) = 1

Anything times zero is zero.
0cos4 + cos2(0) * sin2(0) = 1

Reorder the terms for easier multiplication:
0 + 0 * 0cos2 * in2s = 1

Multiply 0 * 0
0 + 0cos2 * in2s = 1

Anything times zero is zero.
0 + 0cos2 * in2s = 1

Combine like terms: 0 + 0 = 0
0 = 1

Solving
0 = 1

Couldn't find a variable to solve for.

This equation is invalid, the left and right sides are not equal, therefore there is no solution.