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In a `DeltaP Q R` , if `3""s in""P""+""4""cos""Q""=""6` and `4""s in""Q""+""3""cos""P""=""1` , then the angle R is equal to (1) `(5pi)/6` (2) `pi/6` (

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In a `DeltaP Q R` , if `3""s in""P""+""4""cos""Q""=""6` and `4""s in""Q""+""3""cos""P""=""1` , then the angle R is equal to (1) `(5pi)/6` (2) `pi/6` (3) `pi/4` (4) `(3pi)/4`
A. `(3pi)/(4)`
B. `(5pi)/(6)`
C. `(pi)/(6)`
D. `(pi)/(4)`
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Correct Answer - C
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