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The simplest value of cot9 cot27 cot63 cot81 is- (1) 0 (2) 1 (3) -1 (4) (3)^1/2

The simplest value of cot9 cot27 cot63 cot81 is-
(1) 0
(2) 1
(3) -1
(4) (3)^1/2

Grade:12th pass

1 Answers

Harsh Patodia IIT Roorkee
askIITians Faculty 907 Points
6 years ago
cot9 = tan (90-9) =tan81
tan81 cot81 =1
similarly cot27cot63=1
Simplest value will be 1.

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