Trigonometry Examples

Expand Using Sum/Difference Formulas (4+x)(4-x)
Step 1
Expand using the FOIL Method.
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Step 1.1
Apply the distributive property.
Step 1.2
Apply the distributive property.
Step 1.3
Apply the distributive property.
Step 2
Simplify and combine like terms.
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Step 2.1
Simplify each term.
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Step 2.1.1
Multiply by .
Step 2.1.2
Multiply by .
Step 2.1.3
Move to the left of .
Step 2.1.4
Rewrite using the commutative property of multiplication.
Step 2.1.5
Multiply by by adding the exponents.
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Step 2.1.5.1
Move .
Step 2.1.5.2
Multiply by .
Step 2.2
Add and .
Step 2.3
Add and .