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- a. Show that y = tan u increases on every open interval in its domain. b. If the conclusion in part (a) is really correct, how do you explain the fact that tan π= 0 is less than tan (π/4) = 1?If cos x is replaced by 1 - (x2/2) and |x |<0.5, what estimate can be made of the error? Does 1 - (x2/2) tend to be too large, or too small? Give reasons for your answer.Two masses hanging side by side from springs have positionss1 = 2 sin t and s2 = sin 2t, respectively. When in the interval 0 ≤ t≤ 2π is the vertical distancebetween the masses the greatest? What is this distance?
- (a) What is the maximum error possible in using the approximation\[\sin x \approx x-\frac{x^{3}}{3 !}+\frac{x^{5}}{5 !}\]when $-0.3 \leqslant x \leqslant 0.3 ?$ Use this approximation to find sin $12^{\circ}$ correct to six decimal places.(b) For what values of $x$ is this approximation accurate to within $0.00005 ?$a. Show that y = tan u increases on every open interval in its domain. b. If the conclusion in part (a) is really correct, how do you explain the fact that tan pai = 0 is less than tan (pai/4) = 1?Find the absolute extremum point(s) of f(x) = e1−cos x on [−π/2, π), if any.
- Follow the proof of Theorem 2.6 in the text book( using the limit approach) to prove that: d d x [ cos x ] = − sin x 2.(a) Find the derivative of the function g ( x ) = sin 2 x + cos 2 x (b) then use a trigonometric identity to confirm the result in the quicker way. 3. Use implicit differentiation to prove that d d x [ x n ] = n x n − 1 4. A man 6 ft tall walks at a rate of 5 feet per second away from a light that is 15 ft above the ground. When he is 10 feet from the base of the light, at what rate is the tip of his shadow moving?In the interval [0, pi], find the absolute extrema of: g(x) = ex sin x - sin x + cos xFind the period of the function f(x) = sin(2.12x). Provide 4 decimal places.