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The number of real values of x such tha...

The number of real values of x such that
`(2^(x)+2^(-x)-2 cos x)(3^(x+pi)+3^(-x-pi)+2 cos x)(5^(pi-x)+5^(x-pi)-2 cos x)=0` is :

A

1

B

2

C

3

D

infinite

Text Solution

Verified by Experts

The correct Answer is:
B
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VK JAISWAL-COMPOUND ANGLES-Exercise-5 : Subjective Type Problems
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  13. If sin^(3)theta+sin^(3)(theta+(2pi)/(3))+sin^(3)(theta+(4pi)/(3))=a s...

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  14. If sum(r=1)^(n)((tan 2^(r-1))/(cos2^(r )))=tanp^(n)-tan q, then find t...

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  15. If x=sec theta-tan theta and y=cosectheta+cot theta,then Find y-x-xy...

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  16. If cos18^(@)-sin18^(@)=sqrt(x)sin27^(@), then x=

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  18. Q. x=a satisfy the equation 3^(sin 2x+2 cos^2 x)+3^(1-sin 2x+2 sin^ 2x...

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  19. The minimum value of (sintheta+c o s e ctheta)^2+(costheta+sectheta)^...

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  20. If tan20^(@)+tan40^(@)+tan80^(@)-tan60^(@)=lambda sin40^(@), then lamb...

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  21. If K^(@) lies between 360^(@) and 540^(@) and K^(@) satisfies the equa...

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