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Prove that sin 2x=(2 tan x)/(1+tan^(2)x)...

Prove that `sin 2x=(2 tan x)/(1+tan^(2)x)`

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OSWAAL PUBLICATION-SAMPLE PAPER 3-EXERCISE
  1. Taking the set of natural numbers as the universal set, write down the...

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  2. Find the value of cos (-1710^(@)).

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  3. Prove that sin 2x=(2 tan x)/(1+tan^(2)x)

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  4. Find the least positive integer m such that ((1+i)/(1-i))^(4m)=1.

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  5. Solve {3(2x-5)-7} ge -9(x-5).

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  6. Find the distance of a point(3,-5) from the line 3x-4y-5=0

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  7. Find the angle between the lines y - sqrt(3) x - 5 = 0 and sqrt(3) y...

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  8. Evaluate:underset(x rarr -2)lim (1/x+1/2)/(x+2)

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  9. Show that the points P(- 2 , 3, 5) , Q (1, 2, 3) and R(7, 0, -1) are c...

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  10. Write the contrapositive and converse of "If a paralleogram is a squar...

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  11. Write the mean of the given data : 6,7,10,12,13,4,8,12 ?

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  12. If A and B are mutually exclusive events, given that P(A)=3/5,P(B)=1/5...

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  13. There are 200 individuals with a skin disorder, 120 had been exposed t...

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  14. There are 200 individuals with a skin disorder, 120 had been exposed t...

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  15. Let A={1,2},B={1,2,3,4],C={5,6}.Verify that A xx (B nn C)=(A xx B) nn ...

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  16. In any triangle ABC, sin.(A)/(2) is

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  17. Express (-1+i)/(sqrt(2)) in the polar form.

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  18. Solve the equation x^2+x/sqrt 2 +2=0

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  19. In how many ways can 5 girls and 3 boys be selected in a row so that ...

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  20. Find the middle term in the expansion of ((x)/(3)+9y)^(10)

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