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Prove that : sin3x=3sinx-4sin^(3)x...

Prove that : `sin3x=3sinx-4sin^(3)x`

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OSWAAL PUBLICATION-SAMPLE PAPER 4-EXERCISE
  1. Let A={1,2} and B={3,4}. Write A xx B. How many subsets will A xx B ha...

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  2. The minute hand of a watch is 1.5 cm long. How far foes its tip move i...

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  3. Prove that : sin3x=3sinx-4sin^(3)x

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  4. If x+iy=(a+ib)/(a-ib), prove that x^(2)+y^(2)=1

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  5. Solve the inequality(2x-5)gt(1-5x) and represent the solution graphica...

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  6. By using the concept of equation of the line prove that the three poin...

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  7. Find the equation of the line parallel to the line 3x -4y + 2=0 and pa...

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  8. Find the ratio in which the y-z plane divides the line segment formed ...

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  9. Compute the derivative of f(x) = sin^(2) x.

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  10. By giving counter example, show that the following statement is false....

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  11. The mean and variance of heights of XI students are 162.6 cm and 127.6...

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  12. A card is selected from a pack of 52 cards.Calculate the probability ...

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  13. A card is selected from a pack of 52 cards.Find the probability that t...

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  14. In a survey of 400 students in a school, 100 were listed as taking app...

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  15. Let f(x)=x^2" and "g(x)=2x+1 be two real values functions, find (f+g...

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  16. Let f(x)=x^2" and "g(x)=2x+1 be two real values functions, find (f-g...

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  17. Let f(x)=x^(2) and g(x)=2x+1 be two real functions. Find (f+g) (x), (f...

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  18. Find the genral solution of sec^(2) 2x=1 -tan 2x

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  19. Express (1+i)/(1-i) into polar form.

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  20. Solve:2x^2+sqrt 3x+1=0

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