Solve the following


In a $\triangle P Q R$, if $3 \sin P+4 \cos Q=6$ and $4 \sin Q+3 \cos P=1$, then the angle $R$ is equal to :

  1. $\frac{3 \pi}{4}$

  2. $\frac{5 \pi}{6}$

  3. $\frac{\pi}{6}$

  4. $\frac{\pi}{4}$

Correct Option: , 3


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