How do you find the trigonometric functions of values that are greater than 360^@360∘?

1 Answer
Wataru
Oct 24, 2014

Since the values of trig functions remain the same if you add or subtract a multiple of 360^circ360∘ to or from the angle; for example,

sin(390^circ)=sin(390^circ-360^circ)=sin(30^circ)=1/2sin(390∘)=sin(390∘−360∘)=sin(30∘)=12

cos(-630^circ)=cos(-630^circ+2cdot360^circ)=cos(90^circ)=0cos(−630∘)=cos(−630∘+2⋅360∘)=cos(90∘)=0.

I hope that this was helpful.

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