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Work out the size of angle A
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Work out the size of angle A

Work out the size of angle A-example-1
User Harpreet
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use sin rule first to get angle C
11/sinC = 9/Sin38
cross multiplication
SinC = 11Sin38/9
ARCSinC (sin inverse) to find C
then angle A= 180 minus (angle C plus angle B)
User Jarek Bielicki
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