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Trigonometry Examples
Popular Problems
Trigonometry
Solve for x cos(x-y)cos(x+y)=cos(x)^2-sin(y)^2
Step 1
Move all the
expressions
to the left side of the
equation
.
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Step 1.1
Subtract from both sides of the
equation
.
Step 1.2
Add to both sides of the
equation
.
Step 2
Replace with .
Step 3
Simplify the left side.
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Step 3.1
Apply pythagorean
identity
.
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