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If cosP=1/7a n d\ cos Q=(13)/(14)w h e r...

If `cosP=1/7a n d\ cos Q=(13)/(14)w h e r e\ P\ a n d\ Q` both are acute angles. Then, the value of `P-Q` is a.`30^0` b. `60^0` c. `45^0` d. `75^0`

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RD SHARMA ENGLISH-TRIGONOMETRIC RATIOS OF COMPOUND ANGLES-All Questions
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  11. If cosP=1/7a n d\ cos Q=(13)/(14)w h e r e\ P\ a n d\ Q both are acute...

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