Donald John Trump (born June 14, 1946) is the 45th and current President of the United States, in office since January 20, 2017. Before entering politics, he was a businessman and television personality.
Asymptotes of Secant, Cosecant, and Cotangent. To find the x-intercepts and asymptotes of secant, cosecant, and cotangent, rewrite them in terms of sine and cosine. Notice that since secant and cosecant have 1 in the numerator and a trig function in the denominator, they can never equal zero; they do not have x-intercepts. The vertical asymptotes of the three functions are whenever the denominators are zero.
I can use a trig identity to get a quadratic in cosine: cos2(x) + cos(x) = sin2(x) cos2(x) + cos(x) = 1  cos2(x) 2cos2(x) + cos(x)  1 = 0. (2cos(x)  1)(cos(x) + 1) = 0. cos(x) = 1/2 or cos(x) = 1. The first trig equation, cos(x) = 1/2, gives me x = 60 and x = 300. The second equation gives me x = 180. I can The sine wave is zero at 0, 180, and 360. The cosine is 1/2 at 60, and thus also at 360  60 = 300.