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  • Question 1
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    The value of the expression: sin21° + sin211° + sin221° + sin231° + sin241° + sin249° + sin259° + sin269° + sin279° + sin289° is?

  • Question 2
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    How many terms are there in 20, 25, 30......... 140

  • Question 3
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    How many terms are there in the GP 5, 20, 80, 320........... 20480?

  • Question 4
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    If a + b + c = 9 (where a, b, c are real numbers) then the minimum value of a2 + b2 + c2 is?

  • Question 5
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    If \(y=\frac{1}{a-z},\) then \(\frac{d z}{d y}=\)

  • Question 6
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    \(\frac{d}{d x}\left[\cos \left(1-x^{2}\right)^{2}\right]=\)

  • Question 7
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    The average age of three boys is 15 years. If their ages are in ratio 3 : 5 : 7, the age of the youngest boy is

  • Question 8
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    If log a/b+log b/a = log(a+b),then:

  • Question 9
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    If \(y=1+x+\frac{x^{2}}{2 !}+\frac{x^{3}}{3 !}+\ldots \ldots \infty,\) then \(\frac{d y}{d x}=\)

  • Question 10
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    \(\frac{d}{d x}\left(\tan ^{-1} \frac{\cos x}{1+\sin x}\right)=\)

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