2013年12月19日 · Start with an isosceles triangle with legs of unit length and vertex angle 2t. Let x be the length of the base. By the law of cosines [c 2 =a 2 +b 2 -2ab cos θ], you have x = √(2-2cos 2t).

2014年3月30日 · Complex Mathematics pioneered by Leonhard Euler uses these roots to give the complementary solution to y'' + y = 0 as y h = C 1 cos t + C 2 sin t. The general solution then consists of all linear combinations of y 1 = cos t and y 2 = sin t. To solve by Variation Of Parameters, first rewrite 3sin 2t + tcos 2t as 6(sin t)cos t + tcos 2 t - tsin 2 t.

2017年4月9日 · Ask a question for free Get a free answer to a quick problem. Most questions answered within 4 hours.

2014年11月15日 · (1-cos(2t))/sin^2(t) = 2 cot^2(t) Report. 11/15/14. Darryl S. Yes that is the problem. Sorry Report. 11/15 ...

2023年3月23日 · This gives v(t) = (1, -2, 5) + (5/2 t^2, -2cos t + 2, 1/2 sin(2t)) = (5/2 t^2 + 1, -2cos t, 1/2 sin(2t) + 5). Similarly, for the position, you integrate velocity and use the initial conditions. That is r(t) = r(0) + integral v(t) from 0 to t.

Kierstin S. asked • 04/29/20 Find all exact solutions on the interval [0, 2π). (Enter your answers as a comma-separated list.) cos(2t) = −sin(t)

2020年3月24日 · Let csc t = sqrt 37 with t in QII and find cos 2t. Log in Sign up. Find A Tutor ... When squaring cos(t ...

Tarryn P. asked • 10/30/19 In a predator/prey model, the predator population is modeled by y = 700 cos(2t) + 8000 where t is measured in years.

2017年10月10日 · Ask a question for free Get a free answer to a quick problem. Most questions answered within 4 hours.

2023年10月13日 · The forced spring-mass system 4x'' + 16.8x = cos(2t) exhibits amplitude modulation, or beats. What is the beat frequency?