sin cos problem. How to solve it
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why sind(45)=-0.707
it should be 0.707
and sind(18)=-0.9511
it should be 0.309
what's wrong with it
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Iain
2014-8-29
0 个投票
Theres 2 things that could be wrong.
1. User error - You're actually putting in something like: (-90 + 18) and (-90 + 45), instead of 18 and 45. - This is what I expect
2. A bad prank - Someone has written a function called sind that doesn't do what you think it should, and you're actually using that function.
4 个评论
Michael Haderlein
2014-8-29
>> sind(45)
ans =
0.707106781186547
Here, it's doing what it's supposed to do. Please type in
type sind
and post the result here.
Iain
2014-8-29
If the result of:
which sind
says built-in, then you're using the built in version. If it says ....\sind.m, then the file can have been altered (which would be a bad prank)
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