Grade 12th passTrigonometry
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
1 Answer
Harsh Patodia
cot9 = tan (90-9) =tan81
tan81 cot81 =1
similarly cot27cot63=1
Simplest value will be 1.
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