Grade 8Trigonometry
cot54/tan36+tan20/cot70
cot54/tan36+tan20/cot70
3 Answers
Ashutosh Sharma
Cot54/tan36 + tan20/cot70 -2tan45
=> cot(90-36)/tan36 + tan(90-70)/cot70 - 2
=> tan36/tan36 + cot70/cot70 - 2
=> 1+1-2
=> 0
=> cot(90-36)/tan36 + tan(90-70)/cot70 - 2
=> tan36/tan36 + cot70/cot70 - 2
=> 1+1-2
=> 0
PRAYAG VARSHNEY
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
| 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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