Prove that sin(a+b+c)=cosacosbcosc(tana+tanb+tanc-tanatanbtanc)and deduce that if a, b, c are the angle of triangle, then cotacotb+cotbcotc+cotccota=1

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Prove that sin(a+b+c)=cosacosbcosc(tana+tanb+tanc-tanatanbtanc)and deduce that if a, b, c are the angle of triangle, then cotacotb+cotbcotc+cotccota=1

Prove that sin(a+b+c)=cosacosbcosc(tana+tanb+tanc-tanatanbtanc)and deduce that if a, b, c are the angle of triangle, then cotacotb+cotbcotc+cotccota=1

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Prove that sin(a+b+c)=cosacosbcosc(tana+tanb+tanc-tanatanbtanc)and deduce that if a, b, c are the angle of triangle, then cotacotb+cotbcotc+cotccota=1

Prove that sin(a+b+c)=cosacosbcosc(tana+tanb+tanc-tanatanbtanc)and deduce that if a, b, c are the angle of triangle, then cotacotb+cotbcotc+cotccota=1

1 Answers

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