Bradford T. answered • 09/13/21

MS in Electrical Engineering with 40+ years as an Engineer

Actually, this is pretty simple to answer. Check if your calculator defaults to degrees or radians. My calculator defaults to degrees, but has a "drg" key that lets you select degrees, radians or grads.

19cos(38°) ≈ 14.97

19cos(38 radians) ≈ 18.14

Notice that Wolfram alpha gives you a choice:

"Assuming trigonometric arguments in degrees | Use radians instead"

Bradford T.

09/14/21

John M.

09/15/21

Jakob L.

Thanks, I'm thirteen and have just started learning about trigonometry. I have been wanting to learn about this since I was nine, when I just knew what some of the trigonometric functions were. Your answer was really helpful, so thank you.09/14/21