feglin1
feglin1
10-10-2021
Mathematics
contestada
work out the size of angle A
Respuesta :
nonyyamryassin
nonyyamryassin
10-10-2021
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)
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