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When you enter sin, cos or tan in the calculator, why is it required to change the mode from radians to degrees? Is it because radians are some other unit that are not used when calculating an angle of a right triangle?

e.g sin(20) in radians is: ≈ .913

and sin(20) in degrees is: ≈ .342

Thanks for the help.

edit: thanks!

Guest Feb 18, 2019

edited by
Guest
Feb 18, 2019