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02-08-2020
Mathematics

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02-08-2020

Answer:

angle B=92

Step-by-step explanation:

cos C= adj/hyp

sin C=12/14=6/7 ( in rad.)

angle C is 31 degree

the sum of angles of triangle =180

angles A+B+C=180

angle B=180-(31+57)=92 degrees

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