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The value of (1- tan^2 15^@)/(1+tan^2 15...

The value of `(1- tan^2 15^@)/(1+tan^2 15^@)`

A

1

B

`sqrt3`

C

`(sqrt3)/(2)`

D

2

Text Solution

Verified by Experts

The correct Answer is:
c
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CBSE COMPLEMENTARY MATERIAL-TRIGONOMETRIC FUNCTIONS -SHORT ANSWER TYPE QUESTIONS
  1. The value of (1- tan^2 15^@)/(1+tan^2 15^@)

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  2. Find the length of an arc of a circle of radius 5cm subtending a ce...

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  3. If sin A =(3)/(5) and (pi)/(2) lt A lt pi  Find cos A, sin 2A

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  4. What is the sign of cos( x/2) – sin(x/2) when (i) 0lt x lt pi/4 (ii) (...

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  5. सिद्ध कीजिए: cos510^(@) cos 330^(@) + sin 390^(@) cos 120^(@) =-

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  6. Find the maximum and minimum value of 24 sin x +7 cos x

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  7. The value of sin(pi+theta)sin(pi-theta)cosec^(2)theta is equal to

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  8. Find the angle in radians between the hands of a clock at 7: 20 PM

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  9. If cot alpha=(1)/(2) , sec beta=(-5)/(3) where pi lt alpha lt (3pi)/2 ...

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  10. If cosx =(-1)/(3) and pi lt x lt (3pi)/(2) Find the value of cos (x/2)...

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  11. If tan A=(a)/(a+1) and tan B=(1)/(2a+1) then find the value of A+B

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  12. A horse is tied to a post by a rope. If the horse moves along a circul...

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  13. Find the minimum and maximum value of sin^(4)x+cos^(2) x where x in R

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  14. If sec x cos 5x + 1 =0, 0 lt x lt 2pi, then x =

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  15. Solve : sqrt(3)cosx - sin=1.

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  16. Solve 2 tan^(2)x + sec^(2) x= 2

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  17. sqrt(2)sectheta+tantheta=1

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  18. Solve 3 tan x + cot x = 5 cosec x

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  19. find x if 3tan(x-1 5^(@))=tan(x+1 5^(@))

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  20. Solve tan x+tan 2x + sqrt3 tan x tan 2x= sqrt3

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  21. Solve tan x+secx = sqrt3

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