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Prove ..cot a + cot(60+a)-cot(60-a)=3 cot3a

Prove ..cot a + cot(60+a)-cot(60-a)=3 cot3a

Grade:11

1 Answers

Arun Kumar IIT Delhi
askIITians Faculty 256 Points
9 years ago
Hello
Thanks & Regards
Arun Kumar
Btech, IIT Delhi
Askiitians Faculty

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