Find the Exact Value sec(arctan(2))

Math
Draw a triangle in the plane with vertices , , and the origin. Then is the angle between the positive x-axis and the ray beginning at the origin and passing through . Therefore, is .
Divide by .
One to any power is one.
Raise to the power of .
Add and .
The result can be shown in multiple forms.
Exact Form:
Decimal Form:
Find the Exact Value sec(arctan(2))

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