• Nov 27th 2009, 01:25 PM
decoy808
i have a problem to solve.

3sin(4x-20)=1.2

should i solve in radians or degree mod on calculator as it gives different answers?

thanks
• Nov 27th 2009, 01:32 PM
craig
Quote:

Originally Posted by decoy808
i have a problem to solve.

3sin(4x-20)=1.2

should i solve in radians or degree mod on calculator as it gives different answers?

thanks

Radians are simply a different way of measuring the angle. If you have not been taught about radians then I would go for degree mode, unless the questions asks otherwise of course.
• Nov 27th 2009, 04:27 PM
mr fantastic
Quote:

Originally Posted by decoy808
i have a problem to solve.

3sin(4x-20)=1.2

should i solve in radians or degree mod on calculator as it gives different answers?

thanks

Looking at the argument of the sine function, I'd suggest that whoever wrote the question intended answers to be in degrees. (Then again, whoever set the question deserves to get whatever you decide since the unit should have been specified but was not).
• Nov 27th 2009, 06:21 PM
HallsofIvy
Generally speaking, problems that specifically deal with angles and triangles, have the angles measured in degrees. But problems in which the trig functions are treated simply as "functions" of a variable, x, have x in radians.