Without using...

Asked by sonali221994 | 17th Dec, 2009, 07:34: PM

Expert Answer:

Consider

tan 1' tan 2' tan 3'...............................tan 89'

tan 1' tan 2' tan 3'...............tan ( 90-3)tan (90-2)tan (90-1)

tan 1' tan 2' tan 3'...............cot3cot2cot1

(tan 1.cot1)tan 2cot2)(tan 3cot 3)..........tan45 =1 (since tan Acot A=1)

 

 

Answered by  | 18th Dec, 2009, 12:25: PM

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