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Find the general solutions of the following equation: `\ cos3theta=\ -1/2`

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Given, `\ cos3theta=\ -1/2`
`cos3theta=cos(2pi/3)`
We know that if `cos x=cosy` the `x=2npi+-y`
or `3theta=2npi+-(2pi/3)`
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RD SHARMA-TRIGONOMETRIC EQUATIONS-Solved Examples And Exercises
  1. Find the general solutions of the following equation: cos e c\ theta=2

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  2. Find the general solutions of the following equation: costheta=1/2

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  3. Find the general solutions of the following equation: \ cos3theta=\ -1...

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  4. Find the general solutions of the following equation: sqrt(3)sec2theta...

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  5. Principal Solution of trigonometric equation: tantheta=1/(sqrt(3)) ar...

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  6. Solve the following trigonometric equation: \ t a n2theta=sqrt(3)

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  7. Solve the following trigonometric equation: tan3theta=-1

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  8. Solve the following equation: sin2theta+costheta=0

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  9. Solve the following equation: sin3theta+cos2theta=0

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  10. Solve the following equation: sin2theta+sin4theta+sin6theta=0

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  11. Find the general solutions of the following equation: sintheta=1/2

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  12. Find the general solutions of the following equation: cosx=-(sqrt(3))/...

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  13. Find the general solutions of the following equation: cos e ctheta=\ -...

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  14. Find the general solutions of the following equation: s e ctheta=sqrt(...

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  15. Find the general solutions of the following equation: t a ntheta=\ -1/...

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  16. Find the general solutions of the following equation: sqrt(3)sectheta=...

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  17. Find the general solutions of the following equation: sin2theta=\ (sqr...

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  18. Find the general solutions of the following equation: sin2theta=cos3th...

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  19. Find the general solutions of the following equation: t a n2thetat ...

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  20. Find the general solutions of the following equation: sin 2theta+cos...

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