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The number of solutions of equation 6cos...

The number of solutions of equation `6cos 2 theta+2cos^(2)(theta//2)+2sin^(2)theta=0, -pilt theta lt pi `is

A

3

B

4

C

5

D

6

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The correct Answer is:
A
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AAKASH SERIES-TRIGNOMETRIC EQUATIONS-LECTURE SHEET (EXERCISE-II (Straight objectives Types Questions)
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  3. The number of solutions of equation 6cos 2 theta+2cos^(2)(theta//2)+2s...

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  4. Let 0lt theta(1)lt theta(2)lt theta(3)lt …….. Denote the positive solu...

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  13. If tan^(2)(pi(x+y))+cot^(2)(pi)x+y=1+sqrt((2x)/(1+x^(2))) where x,y ar...

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  15. For x in (0,pi) the equation sinx+2sin2x-sin3x=3 has

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  16. If 0lexlt2pi then the number of real values of x, which satisy the equ...

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  17. The number of solutions of sec^(2) theta + cosec^(2) theta + 2 cosec^(...

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  18. The number of solution is of the equations 2(sin^(4)2x+cos^(4)2x)+3sin...

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