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cot6 . cot42 .cot66.cot78

cot6. cot42.cot66.cot78

Grade:12

2 Answers

Gautham Pai M K
35 Points
8 years ago

the answer is 1 

express cot in terms of cos/sin and the use the formula as mentioned in the attached file.

Shivam Dimri
43 Points
8 years ago

here apply the formula 

tan(3A) = tan(60-a)   * tan(a)    * tan(60+a)

and continue...

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