+118608 Why is arccos (2.3) invalid?
Well here is a rather pale right angled triangle.
AT is the hyotenuse so it is the longest side
Cos A = AB/AT = little side/longest side
How can you divide a little nummber by a big number and get an answer more than 1? You can't!!
That is why cos of an angel must NOT be more than 1
and that is why arccos (2.3 ) is invalid!
+23246 The smallest possible value of cosine is -1; the largest possible value is +1. Since 2.3 is not within those values, this arccos of 2.3 is impossible.
+118608 Why is arccos (2.3) invalid?
Well here is a rather pale right angled triangle.
AT is the hyotenuse so it is the longest side
Cos A = AB/AT = little side/longest side
How can you divide a little nummber by a big number and get an answer more than 1? You can't!!
That is why cos of an angel must NOT be more than 1
and that is why arccos (2.3 ) is invalid!
