Quote (Freebs @ Jan 21 2015 12:39am)
yep it was right! thanks
http://i61.tinypic.com/2ivh3yt.png
any help with this one?
1/cosT=SQ(2)
cosT=1/(SQ2)
Answers: T=cos-1(1/SQ2)
T=teta, sq=square root
You'll get a value, you can change the sign (cos stays the same), so if u get 0.36 for example, -0.36 is also a valid answer
Can also add 2pi without changing answer, but you'll go out of the interval