Precalculus Examples

Verify the Identity 2sin(x)^2-1=1-2cos(x)^2
Step 1
Start on the left side.
Step 2
Apply Pythagorean identity in reverse.
Step 3
Simplify.
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Step 3.1
Simplify each term.
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Step 3.1.1
Apply the distributive property.
Step 3.1.2
Multiply by .
Step 3.1.3
Multiply by .
Step 3.2
Subtract from .
Step 4
Reorder terms.
Step 5
Because the two sides have been shown to be equivalent, the equation is an identity.
is an identity