Solution

prove

Solution

Solution steps
Manipulating left side
Rewrite using trig identities
We showed that the two sides could take the same form

Popular Examples

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Frequently Asked Questions (FAQ)

  • Is 2cos(x)cos(y)=cos(x+y)+cos(x-y) ?

    The answer to whether 2cos(x)cos(y)=cos(x+y)+cos(x-y) is True