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Let f(x)=|cosxsinxcosxcos2xsin2x2cos2xco...

Let `f(x)=|cosxsinxcosxcos2xsin2x2cos2xcos3xsin3x3cos3x|` then `f'(pi/2)=` 0 (b) `-12` (c) 4 (d) 12

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BANSAL-LIMITS AND DERIVATIVES-All Questions
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  17. Let P(x) be the polynomial x^3+a x^2+b x+c , where a ,\ b ,\ c in R ....

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  18. If sqrt(y+x)+sqrt(y-x)=c (where c!=0 ), then dy/dx

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  19. For the function y=f(x)=(x^2+b x+c)e^x , which of the following holds?...

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  20. Let f'(x)=3x^2sin1/x-xcos1/x , if x!=0\ ; f(0)=0 and f(1//pi)=0 then: ...

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