On the solution of sine function area Know: y = sin (3x - п / 2) = a (0 < a > 1) find: sum of all real number roots in the interval [0,2 Π]
For sine function integral, the product from 0 to 2 π is enough
Excuse me, how to calculate the period of sine function?
If y = asin (ω T + φ), then the period T = 2 π / ω
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- 1. How to find the length of sine function How to find the curve length of y = 0.184sin π X in a period
- 2. Y = cosx, X belongs to [0,3 π / 2], find the area enclosed by the curve and the coordinate axis
- 3. Find the monotone interval of function y = 3sin (2x + π / 4) y = 1 + SiNx y = - cosx is not a number of sine cosine, regardless of the numbers and signs in front of it I want to know why
- 4. A formula for the area of a triangle bounded by a linear function and a coordinate axis, Well, it's very complicated. I can't understand it
- 5. Given the function f (x) = 2lnx + x2 + ax, if the curve y = f (x) has a tangent parallel to the straight line 2x-y = 0, then the value range of real number a is () A. (-∞,-2]B. (-∞,-2)C. (-2,+∞)D. [-2,+∞)
- 6. Ln function domain The domain of the function z = ln [(25-x2-y2) (x2 + y2-4)] is? The two after X and y are squares
- 7. Given that f (x) = LNX + (1 / x) (x > 0), G (x) = lnx-x (x > 0), prove that when x > 0, XLN (1 + 1 / x)
- 8. FX = X-2 / x + a (2-lnx) a > 0 find FX monotone interval
- 9. Let f (x) = a (x + 1 / x) + 2lnx, G (x) = x ^ 2. If a > 0 and a is not equal to 2, the line L is tangent to the image of function f (x) and function g (x), and the equation of tangent L is obtained? It's really a talent. At that time, I was just like you, but I didn't expect to propose a 2x
- 10. The fifth power of F (x) = 1 / 3-The derivative of 4x
- 11. It is known that the parabola y = (- 1 / 7) x ^ 2 + BX + C and the positive half axis of X axis intersect at two points a and B, ab = 4, P is a point on the parabola, and its abscissa is 9, Angle PbO = 135 degrees, cot angle PAB = 7 / 3 (1) Finding the coordinates of point P (2) finding the relation of parabola It's a problem about quadratic function
- 12. In the plane rectangular coordinate system, it is known that the parabola passes through two points a (- 4.0) and B (0. - 4), and the axis of symmetry is a straight line x = - 1 If the point m is a point on the parabola in the third quadrant, the abscissa of the point m is m, and the area of the triangle mAb is s, the function of s with respect to m is obtained. If the point P is a moving point on the parabola and the point q is a moving point on the straight line y = - x, judge that there are several positions that can make the quadrilateral with the point pqbo as the vertex be a parallelogram, and write the corresponding point Q coordinates
- 13. As shown in the figure, in the plane rectangular coordinate system xoy, it is known that the symmetry axis of the parabola is the Y axis, passing through (0,1), (- 4,5) two points 1 find the expression of the parabola 2. Given the coordinates (0,2) of point F, let the abscissa of any point P on the parabola be x0, make PM perpendicular to the x-axis at point m, connect PF, express the line segment PM and line segment PF with the formula containing x0, and compare the size of PM and PF 3 let the straight line PQ passing through point F intersect the parabola at another point Q. try to judge the position relationship between the circle with diameter PQ and the x-axis and explain the reason
- 14. In the plane rectangular coordinate system, translate the parabola to the right y = x + 6x + 8 to make it pass through the origin, and write an analytical formula of the parabola after translation!
- 15. If the image of parabola y = x2 + BX + 4 is shifted 3 units to the right and 2 units to the upper, the analytic expression of the image obtained is y = x2-2x + 3, then the value of B is () A. 2B. 4C. 6D. 8
- 16. The axis of symmetry of the parabola y = (K & sup2; - 2) x & sup2; + m-4kx is a straight line x = 2, and its lowest point is in the straight line y = - 0.5x+ The axis of symmetry of parabola y = (K & sup2; - 2) x & sup2; + m-4kx is a straight line x = 2, and its lowest point is on the straight line y = - 0.5x + 2
- 17. After the parabola y = - X2 is shifted 2 units to the left, the analytical expression of the parabola is () A. y=-(x+2)2B. y=-x2+2C. y=-(x-2)2D. y=-x2-2
- 18. The parabola y = x & # 178; + BX + C is obtained by moving the parabola y = x & # 178; + BX + C upward by 2 units and then to the left by 1 unit
- 19. The area of the figure enclosed by y = ex, x = 0 and y = e is______ .
- 20. The following is an expanded view of a cuboid carton (1) How much iron sheet does it need to make this iron box? (2) What is the volume of this iron box in milliliter Unit centimeter