Coordinate Geometry Question 115

Question: The distance of the point $ (b\cos \theta ,b\sin \theta ) $ from origin is

[MP PET 1984]

Options:

A) $ b\cot \theta $

B) $ b $

C) $ b\tan \theta $

D) $ b\sqrt{2} $

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Answer:

Correct Answer: B

Solution:

Distance $ =\sqrt{b^{2}{{\cos }^{2}}\theta +b^{2}{{\sin }^{2}}\theta }=b $ .