Mathematics, 19.10.2020 01:01, jagdeep5533

Hello.. Find an angle between 0 and 2pi (in decimal form) that is coterminal with the given angle. a. 13pi/5
b. -13pi/3
c. 57pi/2
d. 11pi/7

I know the answer to the first one is 1.88495559215. However, following the formula I was given by my teacher gives me decimals that are higher than the decimal for 2pi or lower than 0, so the other questions keep being wrong. Can someone please help?? I have no idea what to do.

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Hello.. Find an angle between 0 and 2pi (in decimal form) that is coterminal with the given angle....