Question

plzzzzzzz help me urgent







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Answer 1

Answer:

Step-by-step explanation:

sin(B+C-A)=cos(C+A-B)=tan(A+B-C)=1

Since sin(B+C-A)=1 hence B+C-A=90⁰,……(i)

cos(C+A-B)=0 hence C+A-B=0⁰……….(ii)

tan(A+B-C)=1 hence A+B-C=45⁰………..(iii)

Adding (i)and(ii)gives 2C=90⁰ hence C =45⁰

Adding (ii) and ( iii) gives 2A= 45⁰ hence A=22.5⁰

From (i) B=90⁰+A-C=90⁰+22.5⁰–45⁰=67.5⁰

Answer 2

Hii its tom85

B+ C - A= π/4------(1

A+ B - C= π/2 - A- C + B

A + C= π/4-----(2

from --1 and ----2

2A=B

A- B + C=0

C- A =0-----(4

A=C=π/8

B=π/4

A+ B +C = π/4(1+1/2 +1/2)= π/2

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hope it may helps you