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Which of the following equations has no ...

Which of the following equations has no solution?

A

sec`theta`= 23

B

`costheta=sqrt2`

C

`tantheta=1/7`

D

`sintheta=-1/5`

Text Solution

Verified by Experts

The correct Answer is:
B

We know that, range of cos`theta` is [-1,1].
Therefore cos`theta=sqrt2` is not possible.
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