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The value of (cos3theta)/(2cos2theta-1) ...

The value of `(cos3theta)/(2cos2theta-1)` is equal to (a) `costheta` (b) `sintheta` (c) `tantheta` (d) none of these

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RD SHARMA ENGLISH-TRIGONOMETRIC RATIOS OF MULTIPLE AND SUBMULTIPLE ANGLES-All Questions
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