Mathematics, 23.03.2021 04:30 caldonjoshhsms2061

if P Q and R are the angles of triangle pqr are then prove that 2 (SinA/2 + sinR /2) (sinQ/2 - sin/2x ) - cosP = 1- 4 cosP/2 cosQ/2 sinR/2

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if P Q and R are the angles of triangle pqr are then prove that 2 (SinA/2 + sinR /2) (sinQ/2 - sin/2...

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if P Q and R are the angles of triangle pqr are then prove that 2 (SinA/2 + sinR /2) (sinQ/2 - sin/2x ) - cosP = 1- 4 cosP/2 cosQ/2 sinR/2​

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if P Q and R are the angles of triangle pqr are then prove that 2 (SinA/2 + sinR /2) (sinQ/2 - sin/2x ) - cosP = 1- 4 cosP/2 cosQ/2 sinR/2