Xây dựng đáp án và thang điểm cho bài kiểm tra đã thiết kế. Phân tích kết quả của một bài kiểm tra về phương trình cos3x-sin2x=0.

Solve cos3x + sin2x – sin4x = 0. Solution. cos3x + sin2x – sin4x = 0. ⇒ cos3x + 2cos3x.sin(– x) = 0. ⇒ cos3x – 2cos3x.sinx = 0. ⇒ cos3x (1 – 2sinx) = 0. ⇒ cos3x ... cos3x−sin2x=0. ... Struggling with Default ? ... Step by step video & image solution for cos3x-sin2x=0. by Maths experts to help you in doubts & scoring excellent ... ... (0) = 0, y0(0) = 1. Problem 2. We consider the following boundary value ... sin 2x, |x| ≤ 1. 0, |x| > 1. Problem 4. Let z0 = i. Determine the real and ... Ic = [sinxln(sin3x + cos3x)]π/2. 0. − 3∫ π/2. 0 sinx(sin2x cosx − cos2x sinx) sin3x + cos3x dx. = −3∫ π/2. 0 sin3x cosx − cos2x(1 − cos2x) sin3x + cos3x dx. = − ... Apr 3, 2015 ... Where n=0,1,2,…….] 2x=2nπ+(π/2)-3x or 2x=nπ-((π/2)-3x). Therefore, general solution ... We use the initial condition to evaluate the constants. We compute y/ = 3C1 cos 3x - 3c2 sin 3x + 2. 5 cos 2x. Use y(0) = ... Sep 14, 2016 ... The limit of 1-cos(x)/x*sin(x) as x approaches 0 is 0. You can find this by using L ... Feb 26, 2014 ... So we're learning trigonometry in school and I need a little help how to solve a equation. So I got the following equation: sin3x∗co ... 0, k > the region (not shown) enclosed by the graphs of h and g is the base of a solid with square cross sections perpendicular to the x-axis. There is a value ... ... (0,0) to the point (a, b). Note also that |α| = |α|. Page 6. Supplement to ... Let's integrate 8 cos(3x) sin(x). 8 cos(3x) sin(x)=8 e3ix + e−3ix. 2 eix ...