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If costheta+sintheta=sqrt2costheta ,then...

If `costheta+sintheta=sqrt2costheta` ,then show that `costheta-sintheta=sqrt2 sintheta` .

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JBD PUBLICATION-MODEL PAPER (9)-EXERCISE
  1. underset(xrarr0)lim (sqrt(1+x)-1)/x is equal to:

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  2. Six boys and six girls sit in a row randomly. The probability that the...

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  3. If costheta+sintheta=sqrt2costheta ,then show that costheta-sintheta=...

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  4. An angle alpha is divided into two parts such that ratio of the tangen...

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  5. Express (5 - 3i)^3 in the form a + ib .

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  6. If the 2nd , 3nd and 4th terms in the expansion of (x + y)^(n) are...

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  7. Find the middle terms in the expansion of (3-x^(3)/6)^(7)

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  8. Three vertices of parallelogram ABCD are A(3,-1,2), B(1,2,-4), C(-1,1,...

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  9. Write down the truth value of the following: The number 19 is prime.

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  10. Write down the truth value of the following: Every square is a rectang...

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  11. Write the contra positive of the following statements: If you are born...

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  12. Contrapositive of the statement If a number is divisible by 9. then it...

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  13. Let A and B be two non empty sets, then show that AxxB=BxxA. If A=B

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  14. Let A={1,2,3}, B={2,3,4} and C={4,5}.n verify that: Axx(BcupC)=(AxxB)c...

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  15. Prove that sin7x + sin5x + sin3x + sinx = 4cosx cos2x sin4x

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  16. Using Principle of Mathematical Induction, prove that : cos alpha cos ...

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  17. Out of 18 points in a plane, no three are in the same straight line ex...

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  18. Out of 18 points in a plane, no three are in the same straight line ex...

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  19. If 1/(6!)+1/(7!)=x/(8!), find x

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  20. Find the sum to n terms of the sequence 8, 88, 888, 8888,…

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