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Question

In ΔABC,B=900, AB=yunits, BC=3 units, AC=2 units and angle A=x0, then
find the value of y

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Solution

sinx=sinA=BCAC=32
sinx=32
sinx=sin60
x=60
Now, cosx=cos60=12
cosx=ABAC
12=y2
y=1 unit

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