Posted by Anon on Sunday, February 27, 2011 at 6:53am.
If you use a calculator, it would be the cos-1 key.
Depending on the calculator, you would enter the cos value (e.g. 0.2857142857) and press the cos-1 key. Some calculators require the cos-1 key to be pressed first followed by the value.
If you do not use a calculator, let me know what you use, a table of cosines, or something else.
For example, cos-1A is 81.7867893°.
Related Questions
Spherical Trigonometery - I am trying to apply the formula cos c = cos a x cos b...
Trig. Law of Cosines - Show that any triangle with standard labeling... a^2+b^2+...
Maths/Right Triangle - There must be a relationship (formula) between the ...
Math - Eliminate the parameter and write the corresponding rectangular equation ...
Math sin/cos - On a piece of paper draw and label a right triangle using the ...
Math - For value cos (8ð/3). b) write cos (8ð/3) in terms of an ...
geometry - If a triangle has sides of lengths a and b, which make a C-degree ...
Trignometry - If two angles are supplementary, then their sines are equal. ...
Math sin/cos - On a piece of paper draw and label a right triangle using the ...
geometry - I am studying for my GRE exam into grad school and it's been a ...
For Further Reading
