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If A+B+C=180 then Sin 2A+Sin 2B+Sin 2C= k Cos A Cos B Cos C. Then the value of ‘k’ is

If A+B+C=180 then Sin 2A+Sin 2B+Sin 2C=
k Cos A Cos B Cos C. Then the value of ‘k’ is
 

Grade:12

1 Answers

Kaustubh Nayyar
27 Points
9 years ago
There is an identity Sin 2A+Sin 2B+Sin 2C = 4 sinAsinBsinC
but i haven’t read about Sin 2A+Sin 2B+Sin 2C=k Cos A Cos B Cos C

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