Where Did xx Go?

Geometry Level 1

{acos⁡x+bsin⁡x=3asin⁡x−bcos⁡x=4\large \begin{cases} a\cos x +b\sin x =3 \\ a \sin x- b\cos x=4 \end{cases} Given the above, find a2+b2a^2+b^2.

A Former Brilliant Member by A Former Brilliant Member
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