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If a Delta PQR " if" 3 sin P + 4 cos Q =...

If a `Delta PQR " if" 3 sin P + 4 cos Q = 6 and 4 sin Q + 3 cos P =1 , " then" angleR` is equal to

A

`(5pi)/(6)`

B

`(pi)/(6)`

C

`(pi)/(4)`

D

`(3pi)/(4)`

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The correct Answer is:
B
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