Cos hotel Hefei

(i) As shown in the figure ∠AOB=2π3, from the definition of trigonometric function, we can get x 1=cosα, x2=cos(α+2π3).

f(α)= XL-x2 = cosα-cos(α+2π3)= cosα-cosαcos 2π3+sinαsin 2π3 = 32 cosα+32 sinα

=3sin(α+π3)。

∵ Angle α is an acute angle, ∴ π 3 < α+π 3 < 5π 6, ∴ 12 < SIN (α+π 3) ≤ 1,

∴ 32 < 3sin (α+π 3) ≤ I praised it and stepped on it. What is your evaluation of this answer? Put away comments//high quality or satisfaction or special types or recommended answers dottimewindow.iperformance & window.iperformance.mark ('c _ best',+newdate); Lawyer recommendation service: If your problem has not been solved, please describe your problem in detail and consult other similar problems free of charge through Baidu Law Pro 20 16-02-02. As shown in the figure, angles α and β (0 < β < α < π) are made by the negative semi-axis of the X axis, and their terminal edges intersect the unit circle at points P and Q respectively. The starting edge of the known angle α of 220 15-0 1-23 of the known point P coincides with the non-negative semi-axis of the X axis, and the ending edge passes through the point P (SIN 120, cos 120), then α can be () A.60b.606066. Look for cos α-sin 2016-09-13. As shown in the figure, the rectangular coordinate system xOy is established in this paper, with the straight line OM in the third quadrant (making an angle of 45 degrees with the negative X axis) and the positive Y axis as the boundaries, and at 220 13- 12-65448 with X < 0. A< 180 degrees), their terminal edges intersect with the unit circle at points p and q, respectively. The unit circle and the X axis13201-07-15 are in the plane rectangular coordinate system, and the negative half axis of the X axis is the starting edge of the angle. If the terminal edges of angles α and β are in simplex,> recommends: Why is the cost of cancer treatment getting higher and higher? What impact will the "network toilet" have? The price of electric cars has dropped many times. Is the quality guaranteed? Is Huaqiang North's second-hand mobile phone reliable? Baidu legal pro-free legal service recommends super 3w professional lawyers, 24-hour online service, with an average of 3 minutes to reply to free appointments. Online lawyers guide professional lawyers to complete one-on-one communication at any time, waiting for your answer? Change and help more people? Download Baidu Know APP and grab a fresh experience. Know the APP with Baidu and grab a fresh experience immediately. There may be answers that others want to know in the camera of your mobile phone. Scan QR code to download illegal and harmful information about personal and corporate infringement complaints. Please select and submit a category below.

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