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Find the value of the following : (a) s...

Find the value of the following :
(a) `sin 120^(@)` (b) `cos 135^(@)` (c ) `tan 150^(@)`

A

(a) `3//2` (b) ` -1//sqrt2` (c ) `-1 // sqrt3`

B

(a) `sqrt 3//2` (b) ` -1//sqrt2` (c ) `-1 // sqrt3`

C

(a) `sqrt 3//2` (b) ` -1//sqrt2` (c ) `-1 //3`

D

(a) `sqrt 3//2` (b) ` -1//2` (c ) `-1 // sqrt3`

Text Solution

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The correct Answer is:
B
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PRADEEP-MATHEMATICAL TOOLS-PROBLEMS FOR PRACTICE
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  2. Find the value of the following : (a) sin ( - 30^(@)) (b) cos (-60^(@...

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  3. Find the value of the following : (a) sin 120^(@) (b) cos 135^(@) (c ...

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  4. Find the value of the following : (a) sin 210^(@) (b) cos 220^(@) (c ...

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  5. If sin theta = 3//5, find the values of costheta and tantheta.

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  6. An inclined plane rises 1 in 10. if the length of the inclined plane i...

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  7. Simplify the following : (i) (0.0036)^(1//5) (ii) (0.056)^(2//3) (ii...

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  8. Simplify the following : (i) (0.05246)^(1//8) - 2.6055 (ii) (3.142xx...

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  9. Find antilog of (i) - 2.6674 (ii) - 3.01 (iii) -0.3467

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  10. Differentiate the following w.r.t.x (i) pi^2 (ii) e^2 (iii) -14

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  11. Differentiate the following w.r.t.x (1) (3x +5) (ii) x^(-2) (iii) x^...

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  12. Differentiate the following w.r.t.x (i) 3 x^(5//2) (ii) (4x)^(1//3) ...

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  13. Differentiate the following w.r.tx (i) (5x^(2) +6)(2 x^(3) +4 ) (ii...

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  14. Differentiate the following w.r.t.x (i) (2)/((3x +1) (ii) (3x +5)/(...

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  15. Differentiate the following w.r.t.x sin 3x (ii) cos^2x (iii) sin x^3

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  16. Differentiate the following w.r.t.x and find the value when x =9. (i...

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  17. Differentiate the following w.r.t., x (i) tan^3 x (ii) (cos x)/((1 -...

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  18. If x=a(theta+sintheta) and y=a(1-costheta), find dy//dx.

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  19. If x =at^3 and y = bt^2, find (dy)/(dx).

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  20. If x = a cos theta and y = b sin theta, find (dy)/(dx)

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