# tan()

tan(x) returns tan x. Input number is in radian
``````import math
print(math.tan(1))       # 1.5574077246549023
print(math.tan(0.56))    # 0.6269495350526982
print(math.tan(-0.56))   # -0.6269495350526982
print(math.tan(-1))      # -1.5574077246549023
print(math.tan(0))       # 0.0
print(math.tan(math.pi)) # -1.2246467991473532e-16``````
Note that all the inputs are in radian.

## Inputs in degree

We can convert radian value to degree and use the same
``````import math
in_degree = 90
in_redian = math.radians(in_degree)
print(math.tan(in_redian))     # 1.633123935319537e+16``````
1 radian = 57.2957914331 degree
1 degree = 0.0174533 radian

## Drawing graph of tan()

Utang this we will use Matplotlib to generate graph of tan
``````import matplotlib.pyplot as plt
x=[]
y=[]
i=0
while (i<=8):
x.append(i)
y.append(math.tan(i))
i=i+0.1
plt.plot(x,y)
plt.axvline(x=0.00,linewidth=2, color='#f1f1f1')
plt.axhline(y=0.00,linewidth=2, color='#f1f1f1')
plt.grid(linestyle='-', linewidth=0.5,color='#f1f1f1')
plt.show()``````

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