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Qn #872
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If $a\, \cos \theta+b\, \sin \, \theta=2$ and $a\, \sin \, \theta-b\, \cos \, \theta=3$ , then ${a}^{2^{}}+{b}^2=$
A.
6
B.
5
C.
13
D.
10
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❓ Question: If $a\, \cos \theta+b\, \sin \, \theta=2$ and $a\,... | TANCET Group Studies | Tancet Group Studies