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ashish1999sheoran

  • 2 years ago

Prove that: cos(A+B)+sin(A-B)=2sin(45+A)cos(45+B)

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  1. cwrw238
    • 2 years ago
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    yes i think thats the way to go

  2. cwrw238
    • 2 years ago
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    possibly using the product to sum formulae

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