If θ is the angle between the curves y=sin x, y =cosx at x=π/4 then tan θ=

A curve passes through the point (2, 0) and the slope of the tangent at any point is x²-2x for all values of x. The point of maximum or donation the curve is

The function f(x) = tan x has

f(x)= x-1/x is

The function f(x)=cot^-1 x+x increases in the interval

The point P in the first quadrant of the ellipse x²/8+y²/18=1 so that the area of the triangle formed by the tangent at P and the coordinate axes is least

A rectangular sheet of dimensions 30 cm * 80 cm four equal squares of side x cm are removed at the corners, and the sides are then turned up so as to form an open rectangle box. The value of x, so that the value of the box is the greatest is

The displacement of a body of mass 100kg in a rectilinear motion is given by the formula s=2t²+3t+1. The K.E of the body 5 sec after the start is

If the slope of the tangent to the curve xy+ax=by at (1, 1) is 2, then (a, b)

The function f(x)=a sin x+1/3x has maximum value at x =π/3. The value of a is