Question

if A,B,C are angles of a triangle then sinA + sinB + sinC=?


please help who can help me their answer will be marked as brainliest answer​

Answer 1

Answer:

sinA+sinB+sinC=180...sum of all angles of triangles is 180 degree

Answer 2

Answer:

cosAcosB+sinAsinBsinC≤cosAcosB+sinAsinB

⇒1≤cos(A−B)⇒cos(A−B)=1

⇒A=B and C=2π

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