The angle 13π/10 , is coterminal to 33π/10 .
The angles which have the initial side on the positive x axis and share the common terminal side are called Coterminal Angles.
To find coterminal angles
The angle given needs to be either subtracted or added to 2π
a coterminal angle that is between 0 and 2π and
Coterminal with 33π/10
33π/10 - 2π = 13π/10
Therefore 13π/10 , is coterminal to 33π/10 .
To know more about Coterminal Angles
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