Home
Class 11
MATHS
If tanA=(sqrt3-1)/(sqrt3+1),"then": cos ...

If `tanA=(sqrt3-1)/(sqrt3+1),"then": cos A=`

A

`(sqrt3-1)/(2sqrt2)`

B

`(sqrt3+1)/(2sqrt2)`

C

`(sqrt3+1)`

D

`(sqrt3-1)`

Text Solution

Verified by Experts

The correct Answer is:
B
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • TRIGONOMETRIC FUNCTIONS

    MARVEL PUBLICATION|Exercise MCQs|175 Videos

  • STRAIGHT LINE

    MARVEL PUBLICATION|Exercise MISCELLANEOUS MCQS|160 Videos

  • TRIGONOMETRIC FUNCTIONS OF COMPOUND ANGLES AND FACTORIZATION FORMULAE

    MARVEL PUBLICATION|Exercise MCQs|101 Videos

Similar Questions

Explore conceptually related problems

If tanA=(1)/(sqrt(3))andtanB=sqrt(3) ,then find the value of cosAcosB-sinAsinB

If x=(sqrt3-1)/(sqrt3+1) and y=(sqrt3+1)/(sqrt3-1) then x^2-xy+y^2

Knowledge Check

  • If x=(sqrt(3)+1)/(sqrt3-1)andy=(sqrt3-1)/(sqrt3+1),"then "x^(2)+y^(2) is equal to

    A
    14
    B
    13
    C
    15
    D
    10

  • If in Delta ABC, sin B cos C = (sqrt3 -1)/(sqrt3) and cos B sin C = (1)/(sqrt3), then the triangle is

    A
    isosceles
    B
    equilateral
    C
    right angled triangle
    D
    right angled isosceles

  • If (sqrt3 - 1) sin theta + (sqrt3 + 1) cos theta = 2 , then theta =

    A
    `2n pi pm pi/4 + pi/12`
    B
    `n pi + (-1)^n pi/4 + pi/12`
    C
    `2 n pi pm pi/4-pi/12`
    D
    `n pi + (-1)^n pi /4 - (5pi)/12 `

    • Similar Questions

    Explore conceptually related problems

    tan^(-1)(sqrt3)-cot^(-1)(-sqrt3)

    Find a and b when (sqrt3 -1)/(sqrt3 +1) +(sqrt3 +1)/(sqrt3 -1) = a+sqrt3 b

    The area of the triangle formed by three point sqrt3 +i, -1+sqrt3i and (sqrt3-1) +(sqrt3+1)i is ________

    sin(cos^(-1)(-sqrt3/2))=?

    If a=sin^(-1) (-sqrt2/2)+cos^(-1) (-1/2) and b=tan^(-1) (-sqrt3)-cot^(-1) (-1/sqrt3) , then

    Home
    Profile