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The number of all possible ordered pairs...

The number of all possible ordered pairs `(x, y), x, y in R` satisfying the system of equations `x + y = (2pi)/(3), cos x + cos y = (3)/(2)` is

A

0

B

1

C

infinite

D

none of these

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The correct Answer is:
A
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OBJECTIVE RD SHARMA ENGLISH-TRIGONOMETRIC EQUATIONS AND INEQUATIONS-Chapter Test
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  8. If sin(pi cos theta) = cos(pi sin theta), then the value of cos(the...

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  9. If tan(pi cos theta )= cot (pi sin theta ) ,then cos^(2)(theta -pi/...

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  11. The most general value of theta which satisfy both the equation cos th...

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  12. The number of solutions of the x+2tanx = pi/2 in [0.2pi] is

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  13. If "sin" (pi "cot" theta) = "cos" (pi "tan" theta), "then cosec" 2 the...

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  14. The number of distinct roots of the equation A"sin"^(3) x + B"cos"^(3...

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  16. If Cos20^0=k and Cosx=2k^2-1, then the possible values of x between 0^...

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  17. The general solution of the trigonometic equation "sin"x + "cos"x = 1...

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  18. The general solution of the equation sin^2thetasectheta+sqrt3 tantheta...

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  19. If X=x cos theta-y sin theta, Y=x sin theta+y cos theta and X^(2)+4XY...

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