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lim(xrarr(pi)/2)(1-sinxsin3xsin5x.sin7x)...

`lim_(xrarr(pi)/2)(1-sinxsin3xsin5x.sin7x)/(((pi)/2-x)^(2))` is `k` then `k/6` equal to

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The correct Answer is:
7
`x-(pi)/2=y`
`lim_(yrarr0) (1-cosycose3ycos5ycos7y)/(y^(2))`
`lim_(yrarro) ((sinycos3ycos5ycos7y+3cosysin3ycos5ycos7y),(+5cosycos3ysin5ycos7y+7cosycos3ycos5ysin7y))/(2y)`
`1/2+9/2+25/2+49/2=42`
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RESONANCE ENGLISH-TEST SERIES-MATHEMATICS
  1. Let f(x) be real valued continuous function on R defined as f(x)=x^(2)...

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  2. Let all chords of parabola y^(2)=x+1 which subtends right angle at (1,...

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  3. lim(xrarr(pi)/2)(1-sinxsin3xsin5x.sin7x)/(((pi)/2-x)^(2)) is k then k/...

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  4. If derivative of y=|x-1|^(sinx) at x=-(pi)/2 is (1+api)^(b) then value...

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  5. The value of Sin^-1(sin10) is

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  11. Let A,B and C be square matrices of order 3xx3 with real elements. If ...

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  14. Let x^2+y^2+x y+1geqa(x+y)AAx ,y in R , then the number of possible i...

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