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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

2

B

3

C

4

D

1

Text Solution

Verified by Experts

The correct Answer is:
C
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OBJECTIVE RD SHARMA ENGLISH-TRIGONOMETRIC RATIOS AND IDENTITIES-Exercise
  1. If cosx=tany ,cosy=tanz ,cosz=tanx , then the value of sinx is 2cos18^...

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  2. If k=sin^(6)x+cos^(6)x, then k belongs to the interval

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

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  4. If tan^(2)alpha tan^(2)beta+tan^(2)gamma+tan^(2)gamma tan^(2)alpha+2ta...

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  5. the value of e^(log(10)tan1^@+log(10)tan2^@+log(10)tan3^@....+log(10)t...

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  6. For what and only what values of alpha lying between 0 and pi/2 is the...

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  7. If (secA+tanA)(secB+tanB)(secC+tanC)=(secA-tanA)(secB-tanB)(secC-tanC)...

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  8. If pi lt alpha lt (3pi)/(2), then find the value of expression sqrt(4 ...

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  9. If alpha is an acute angle and sin(alpha/2)=sqrt((x-1)/(2x)) then tan ...

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  10. Find the Value of tan 82 1/2^@

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  11. The value of tan6^0tan42^0tan66^0tan78^0 is 1 (b) 1/2 (c) 1/4 (d)...

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  12. The value of cot36^(@)cot72^(@), is

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  13. The value of cospi/7+cos(2pi)/7+cos(3pi)/7+cos(4pi)/7+cos(5pi)/7+cos(6...

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  14. Find the value of cos(2pi)/7+cos(4pi)/7+cos(6pi)/7

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  15. The value of cos""(pi)/(9)cos""(2pi)/(9)cos""(3pi)/(9), is

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  16. Prove that cos ""(pi)/(9) cos ""( 2pi)/(9) cos "" (3pi)/(9) cos ""(4pi...

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  17. The vlaue of cosec^(2)""(pi)/(7)+cosec^(2)""(2pi)/(7)+cosec^(2)""(3pi)...

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  18. sin1 2^(@)sin4 8^(@)sin5 4^(@)=

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  19. the value of sin(pi/7)+sin((2pi)/7)+sin((3pi)/7) is

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  20. tan^6pi/9-33tan^4pi/9+27tan^2pi/9 is equal to (a) 0 (b) sqrt(3) (c)...

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