MCQ
If $x=a \cos \theta$ and $y=b \sin \theta$, then $b^2 x^2+a^2 y^2=$
- ✓$a^2 b^2$
- B$a b$
- C$a^4 b^4$
- D$a^2+b^2$
✓
Answer
Correct option: A.
$a^2 b^2$
A
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