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If a, b,c are in G.P. then prove that a²+b² |
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Answer» ong>ANSWER: sinS+SIN(S-A)+sin(S-B)-sin(S-C)
{sinS-sin(S-C)}+{sin(S-A)+sin(S-B)}
2cos(2S-C)/2sin(C/2)+2sin(C/2)cos(B-A)/2
=2sinC/2[cos(A+B)/2 +cos(B-A)/2]
=2sinC/2 .[2cos(B/2)cos(A/2)]
=4cos(A/2)cos(B/2)sin(C/2)
THANKS AKA 0 Step-by-step explanation:NNNNNNNNHHHHHHGJJGJGJGJGJGJGJGJKNINIONININB HB JBJBJ |
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