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If for real values of x, cos theta=x+(1)...

If for real values of `x, cos theta=x+(1)/(x),` then

A

`theta` is an acute angle

B

`theta` is a right angle

C

`theta` is an obtuse angle

D

no value of `theta` is possible

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HIMALAYA PUBLICATION-MEASUREMENT OF ANGLES, TRIGONOMETRIC RATIOS AND RELATION BETWEEN SIDES AND ANGLES OF A TRIANGLE-QUESTION BANK
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