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Show that f(x)=tan^(-1)(sinx+cosx) is de...

Show that `f(x)=tan^(-1)(sinx+cosx)` is decreasing function on the interval `(pi/4,pi/2)dot`

A

`0lt m lt 3`

B

`-3 lt m lt 0`

C

`m gt 3`

D

`m lt -3`

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VIKAS GUPTA (BLACK BOOK) ENGLISH-APPLICATION OF DERIVATIVES -EXERCISE (SUBJECTIVE TYPE PROBLEMS)
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  3. On [1,e], then least and greatest vlaues of f (x) = x^(2)ln x are m a...

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  4. If f (x)= (px)/(e ^(x)) - (x ^(2))/(2) + x is a decreasing function f...

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  5. L e tf(x)={x e^(a x),xlt=0x+a x^2-x^3,x >0 where a is a positive cons...

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  6. Find sum of all possible values of the real parameter 'b' if the diffe...

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  7. Let 'theta' be the angle in radians between the curves (x ^(2))/(36) +...

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  8. Let set of all possible values of lamda such that f (x)= e ^(2x) - (la...

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  9. Let a,b,c and d be non-negative real number such that a ^(5)+b^(5) le ...

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  10. There is a point (p,q) on the graph of f(x)=x^(2) and a point (r,s) on...

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  11. If f(x)=max| 2 siny-x|, (where y in R), then find the minimum value o...

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  12. Let f (x) = int (0)^(x) ((a -1) (t ^(2)+t+1)^(2) -(a+1)(t^(4)+t ^(2) +...

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  13. The numbr of real roots of the equation x ^(2013)+ e ^(2014x) =0 is

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  14. Let the maximum value of expression y= (x ^(4)-x ^(2))/(x ^(6) + 2x ^(...

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  15. The least positive integral value of 'k' for which there exists at lea...

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  16. The coordinates of a particle moving in a plane are given by x (t) = a...

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  17. A tank contains 100 litres of fresh water. A solution containing 1 gm/...

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  18. If f (x) is continous and differentiable in [-3,9] and f'(x) in [-2,8]...

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  19. It is given that f (x) is defined on R satisfying f (1)=1 and for AA ...

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  20. The number of normals to the curve 3y ^(3) =4x which passes through th...

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  21. Find the number of real root (s) of the equation ae ^(x) =1+ x + (x ^(...

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