If acos theta +b sin theta =m and asin t...

If `acos theta +b sin theta =m and asin theta-bcos theta =n` then `a^2 + b^2=`

A

`m+n`

B

`m^2-n^2`

C

`m^2+n^2`

D

None of these

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The correct Answer is:

C

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