help!
sin^-1(0.1)=
I put this in my calculator and get 5.73917...
I have a math book that says sin^-1(0.1) 'roughly =' .1
The math text also says: tan^-1(-.4) 'roughly =' -0.38
again my calculator says different: -21.8014.......
2006-12-06 08:06:16 · 3 answers · asked by RogerDodger 1 in Science & Mathematics ➔ Mathematics
Your calculator is set in degrees while the math book gives you the answer in radians.
1 radian = 180/pi degrees (57.29577951... degrees per radian)
For very small angles, x = sin(x)
(when angle x is expressed in radians)
2006-12-06 08:11:55 · answer #1 · answered by Raymond 7 · 4⤊ 0⤋
Your calculator is in degrees instead of radians.
Hit "MODE"
Then about on the third line you get a choice between radians or degrees, highlight radians and press enter.
Should get the right answer now. :)
2006-12-06 16:11:41 · answer #2 · answered by antheia 4 · 2⤊ 0⤋
Make sure you are in the right mode.
You need to figure out whether the answer given is in radians or degree.
2006-12-06 16:10:07 · answer #3 · answered by MsMath 7 · 2⤊ 1⤋