Prove that ( sin alpha cos beta + cos alpha sin beta) square + ( cos alpha cos beta - - Maths - Trigonometric Functions

Question

Prove that ( sin alpha cos beta + cos alpha sin beta) square + (
cos alpha cos beta - sin alpha sin beta) square = 1?

Pooja · Accepted Answer

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Prove that ( sin alpha cos beta + cos alpha sin beta) square + ( cos alpha cos beta - sin alpha sin beta) square = 1?