ThePrismSolutions

ThePrismSolutions

DAILY PRACTICE PAPER(11Th June 2018)

Q. If y = √(1-cosX)/(1+cosX) , then he value of dy/dx

(a) 1/2sec2(X/2)      (b) cosec2(X/2)

(c) -sec2(X/2)        (d) 1/2cosec2(X/2)

Q. If y = log{√(1+cosX)/(1-cosX)}, then dy/dx = :

(a)  cosX      (b) secX

(c)  -secX      (d) -cosecX

Q. If f(X)=|cosX - sinX| , then f'(π/2)

(a)  1        (b)  -1

(c)  0         (d) None of these

Q. If acos2(X + Y)=b, then dy/dx =

(a) 2         (b) 1         
(c) - 1        (d) -2

Q. If y=x/(x+5), then dy/dx =

(a) 5/(1+y)2      (b) 5/(1-y)2    

(c) 1/(1-y)2          (d) None of these



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