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cot54/tan36+tan20/cot70

cot54/tan36+tan20/cot70

Grade:8

3 Answers

Ashutosh Sharma
askIITians Faculty 181 Points
7 years ago
Cot54/tan36 + tan20/cot70 -2tan45
=> cot(90-36)/tan36 + tan(90-70)/cot70 - 2
=> tan36/tan36 + cot70/cot70 - 2
=> 1+1-2
=> 0
PRAYAG VARSHNEY
36 Points
7 years ago
Cot54/tan36 + tan20/cot70 -2tan45
As we know that cot (90-x)=tan x
cot(90-36)/tan36 + tan(90-70)/cot70 - 2
tan36/tan36 + cot70/cot70 - 2 
1+1-2
 0
D jaya
19 Points
7 years ago
Cot54/tan36 + tan20/cot70 -2tan45 => cot(90-36)/tan36 + tan(90-70)/cot70 - 2 => tan36/tan36 + cot70/cot70 - 2 => 1+1-2 => 0

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