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cot6. cot42.cot66.cot78

mahendra shah , 11 Years ago
Grade 12
anser 2 Answers
Gautham Pai M K

Last Activity: 11 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

Last Activity: 11 Years ago

here apply the formula 

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

and continue...

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