34 Alphabetical Listing
►cos
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►cos reduces all powers of
sin(...) modulo 1−cos(...)^2
so that any remaining powers of cos(...)
have exponents in the range (0, 2). Thus,
the result will be free of sin(...) if and only
if sin(...) occurs in the given expression only
to even powers.
Note: This conversion operator is not
supported in Degree or Gradian Angle
modes. Before using it, make sure that the
Angle mode is set to Radians and that Expr
does not contain explicit references to
degree or gradian angles.
cos()
µ key
cos(Expr1) ⇒ expression
cos(List1) ⇒ list
cos(Expr1) returns the cosine of the
argument as an expression.
cos(List1) returns a list of the cosines of all
elements in List1.
Note: The argument is interpreted as a
degree, gradian or radian angle, according
to the current angle mode setting. You can
use °,
G
, or
r
to override the angle mode
temporarily.
In Degree angle mode:
In Gradian angle mode:
In Radian angle mode:
cos(squareMatrix1) ⇒ squareMatrix
Returns the matrix cosine of
squareMatrix1. This is not the same as
calculating the cosine of each element.
In Radian angle mode:
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