Math, asked by harsh0155, 9 months ago

m sinq +n cosq =p, m cosq - n sinq =q m ^2+n^2=p^2+q^2

Answers

Answered by sshailshetty
0

Answer:

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Step-by-step explanation:

m Sin Ф + n Cos Ф  = p

    =>  m² Sin² Ф + n² Cos² Ф + 2 m n Sin Ф Cos Ф  = p²

m Cos Ф - n Sin Ф = q

    =>  m² Cos² Ф + n² Sin²Ф - 2 m n Sin Ф Cos Ф  = q²

add the two equations:

     m² (sin²Ф +Cos²Ф) + n²(sin²Ф+Cos²Ф)  =  p² + q²

m² + n² =  p² + q²

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