Trigonometry Examples

Simplify cos(60)cos(45)-sin(60)sin(45)
Step 1
The exact value of is .
Step 2
The exact value of is .
Step 3
Multiply .
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Step 3.1
Multiply by .
Step 3.2
Multiply by .
Step 4
The exact value of is .
Step 5
The exact value of is .
Step 6
Multiply .
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Step 6.1
Multiply by .
Step 6.2
Combine using the product rule for radicals.
Step 6.3
Multiply by .
Step 6.4
Multiply by .
Step 7
The result can be shown in multiple forms.
Exact Form:
Decimal Form: