1.

If A,B,C are the three angles in a triangle such that 2sinB sin(A+B)−cos A=1 and 2sinC sin(B+C)−cosB=0, then

Answer»

If A,B,C are the three angles in a triangle such that 2sinB sin(A+B)cos A=1 and 2sinC sin(B+C)cosB=0, then



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