Question

in an acute angle triangle ABC if Sin (A + B - C) is equal to 1 /2 and cos( b + c - A) is equal to 1/root 2 find Angle A Angle B and angle C​

Answer 1

Answer:

A=67.5

B=37.5

C=75

Step-by-step explanation:

Process is in picture

Answer 2

Answer:

Step-by-step explanation:

Sin(A+B-C) =sin30

Cos(B+c-a) =cos45

A+B-C=30... 1

B+C-a=45.... 2

ADD 1,2

2B=75

B=75/2

A+B+C=180

A+C=180-32.5

A+C=147.5.. 3

C-A=12.5.. 4

ADD3, 4