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Prove that for all values of theta , the...

Prove that for all values of `theta` , the locus of the point of intersection of the lines `xcostheta+ysintheta=a` and `xsintheta-ycostheta=b` is a circle.

A

An ellipse

B

A circle

C

A parabola

D

A hyperbola

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The correct Answer is:
B
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