Hi everyone! plz help me solve this Compound Angle Formula question: 1. Using Compound Angle Formula, prove that: cos(y - 180°) + sin (y + 90°) = 0 plz thxx
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Originally Posted by coolhacker Hi everyone! plz help me solve this Compound Angle Formula question: 1. Using Compound Angle Formula, prove that: cos(y - 180°) + sin (y + 90°) = 0 plz thxx Now try solving your question
Hello, coolhacker! We are expected to know these formulas: . . . . 1. Using Compound Angle Formulas, prove that: . . . . . We have: . . . . . . . . . . . . . . . . . . . . . . . . . . .
thx u
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