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Find the values of the following trigono...

Find the values of the following trigonometric ratio: `sin510^0`

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`sin 510^{circ}=sin (3 pi-frac{pi}{6})`
`=sin frac{(pi)}{6}`
`[therefore 3 pi-frac{pi}{6}.` lies in second quadrant] `
=frac{1}{2}`
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RD SHARMA-TRIGONOMETRIC FUNCTIONS-Solved Examples And Exercises
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  2. Find the values of the following trigonometric ratio: cos1755^0

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  3. Find the values of the following trigonometric ratio: sin510^0

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  4. Find the values of the following trigonometric ratio: tan(-585^0)

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  7. Find the values of the following trigonometric ratio: cos 855^0

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  8. Find the values of the following trigonometric ratio: "sin"(-330^@)

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  9. Find the values of the following trigonometric ratio: sin1845^0

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  10. Prove that: t a n 225^0cot 405^0+t a n 765^0cot 675^0=\ 0

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  11. Prove that: sin(8pi)/3cos(23pi)/6+cos(13pi)/3sin(35pi)/6=1/2

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  12. Prove that: cos 24^0+cos55^0+cos 125^0+cos 204^@+cos 300^0=1/2

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  13. Prove that: tan(-225^0)cot(-405^0)-tan(-765^0)cot(675^0)=0

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  14. Prove that:cos 570^0sin510^0+sin(-330^0)cos(-390^0)=0

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  15. tan((11pi)/3)-2sin((9pi)/3)-3/4cosec^2(pi/4)+4cos^2((17pi)/6)=(3-2sqrt...

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  16. Prove that: 3sin(pi/6)sec(pi/3)-4sin((5pi)/6)cot(pi/4)=1

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  17. In a DeltaA B C prove that cos(A+B)+cos C=0.

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  18. In a Delta(ABC) prove that cos(("A"+"B")/2)=sin"C"/2dot

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  19. In a "DeltaA B C prove that tan(("A"+"B")/2)=cot("C"/2)

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  20. If A ,\ B ,\ C ,\ D be the angles of a cyclic quadrilateral, taken in ...

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