Aim: Graphing y = tan x HW # Read page 725727 Do page 727/24,6,7 Do page 747/18,46,49 Do Now: Fill in the following table: express to the nearest hundredth x x (in degrees) tan x 0 0 0 π/6 30 .58 π/4 45 1 π/3 60 1.7 π/2 90 undefined 2π/3 120 1.7 3π/4 135 1 5π/6 150 .58 π 180 0 7π/6 210 .58 5π/4 225 1 4π/3 240 1.7 3π/2 270 undefined 5π/3 300 1.7 7π/4 315 1 11π/6 330 .58 π 360 0 2
1) Graph y = tan x from table. 2
Domain:
1
Range: 0
1 2
π/2
π
3π/2
2π
Lesson_16_Graphing_y_=_Tan_x.notebook
March 24, 2014
Describe the graph of the tangent function y= tan (x)
Tangent Function y = tan (x)
π , 3π , 5π The graph of y = tan x is discontinuous at 2 2 2 and π . 2 π 3π 5π π The lines x = , x = , x = , x = etc. 2 2 2 2 are called asymptotes.
The graph of y = tan x has no amplitude. The period of y=tanx is π radians, so tan x = (x + π) has translational symmetry of Tπ,0 .
2) Sketch the graph of y= tan (x) and y = tan(x) from 0≤x≤2π using the graphic calculator. Describe the difference between the two graphs.
the graph of y = tan(x) is the image of y = tanx under a reflection in the xaxis.
Lesson_16_Graphing_y_=_Tan_x.notebook
March 24, 2014
3) a) On the same set of axes, sketch the graphs of y = cos2x and y = tanx as x varies from π to π 2 2 b) Determine the number of points between π 2 π and for which tan x cos 2x = 0. 2