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Using sine tule find Obtuse angle B

Using sine tule find Obtuse angle B-example-1
User Agentfll
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\textit{Law of sines} \\\\ \cfrac{\sin(\measuredangle A)}{a}=\cfrac{\sin(\measuredangle B)}{b}=\cfrac{\sin(\measuredangle C)}{c} \\\\[-0.35em] ~\dotfill\\\\ \cfrac{\sin(B)}{7}=\cfrac{\sin(30^o)}{6}\implies \sin(B)=\cfrac{7\sin(30^o)}{6} \\\\\\ B=\sin^(-1)\left[ \cfrac{7\sin(30^o)}{6} \right]\implies B\approx 35.69^o

Make sure your calculator is in Degree mode.

User Helloimyourmind
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