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the value of tan9^@-tan2 7^@-tan6 3^@+ta...

the value of `tan9^@-tan2 7^@-tan6 3^@+tan8 1^@` is equal to

A

0

B

2

C

3

D

4

Text Solution

Verified by Experts

The correct Answer is:
D
`tan81^(@)-tan63^(@)-tan27^(@)+tan9^(@)`
`tan(90^(@)-9^(@))-tan(90^(@)-27^(@))-tan27^(@)+tan9^(@)`
`cot9^(@)-cot27^(@)-tan27^(@)+Tan9^(@)`
By solving we get
= 4
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