The simplest value of cot9 cot27 cot63 cot81 is-(1) 0(2) 1(3) -1(4) (3)^1/2
kalpana , 8 Years ago
Grade 12th pass
Trigonometry> The simplest value of cot9 cot27 cot63 co...
1 Answers
Harsh Patodia
Last Activity: 8 Years ago
cot9 = tan (90-9) =tan81
tan81 cot81 =1
similarly cot27cot63=1
Simplest value will be 1.
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