Work out the size of angle A

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asked Apr 12, 2022 57.6k views

1 Answer

Jarek Bielicki · Answer 1 · 2022-04-16T07:46:49+0000

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)

Work out the size of angle A

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