Algebra Examples

Simplify (cos(x)^4-sin(x)^4)/(cos(x)^2)
Step 1
Rewrite as .
Step 2
Rewrite as .
Step 3
Since both terms are perfect squares, factor using the difference of squares formula, where and .
Step 4
Simplify.
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Step 4.1
Rearrange terms.
Step 4.2
Apply pythagorean identity.
Step 4.3
Multiply by .
Step 4.4
Since both terms are perfect squares, factor using the difference of squares formula, where and .