We welcome your feedback, comments and questions about this site or page. Curve Reminders Graph of tan x. We know that for a tangent graph, tan θ = 0 when θ= 0˚, 180˚ and 360˚. The period of the function is 360° or 2π radians.You can rotate the point as many times as you like. This preview shows page 60 - 65 out of 80 pages.. 19. Tap for more steps... For any , vertical asymptotes occur at , where is an integer. The Sine Function has this beautiful up-down curve (which repeats every 2π radians, or 360°).It starts at 0, heads up to 1 by π/2 radians (90°) and then heads down to −1. Tangent & Cotangent Graphs: Learn how to graph tan and cot trig functions. • There are vertical asymptotes at each end of the cycle. Please submit your feedback or enquiries via our Feedback page. B. y = 1 tan x. C. y = 1 + tan x. D. y = cos x sin x. E. y = cos x + sin x. HKCEE 1989’ 20. Conic Sections: Parabola and Focus. Set the inside of the tangent function, , for equal to to find where the vertical asymptote occurs for . The tan function is an odd function; we learned about Even and Odd Functions here. The result, as seen above, is rather jagged curve that goes to positive infinity in one direction and negative infinity in the other. The curve is not continuous. The asymptote that occurs at π repeats every πunits. We know that for a tangent graph, tan θ  = 1 when θ= 45˚ and 225˚. Once you learn about the graphs of sine and cosine, its on to other trigonometric functions. tan 1(tan(x)) = xwhen ˇ 2