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If the equation 2 cos x + cos 2 lambda ...

If the equation ` 2 cos x + cos 2 lambda x=3 ` has only one solution , then ` lambda ` is

A

1

B

A rational number

C

An irrational number

D

None of these

Text Solution

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The correct Answer is:
C
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ARIHANT MATHS-TRIGONOMETRIC EQUATIONS AND INEQUATIONS-Exercise (Single Option Correct Type Questions)
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  12. lambda cos x - 3 sinx=lambda +1 is solvable for which value of λ .

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  13. cos 2x- 3 cos x + 1=(1)/((cot 2 x - cot x)sin (x-pi)) holds , if

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  15. If sin^(100) theta - cos^(100) theta =1 , then theta is

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  16. If sqrt(3) sin x - cos x ="min"(alpha in R){2,e^(2),pi, alpha^(2)-4al...

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  17. The number of solutions of the equation cos 4x+6=7 cos 2x , when x ...

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  18. The number of solutions of cot(5pi sin theta )=tan (5 pi cos theta ),...

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