home *** CD-ROM | disk | FTP | other *** search
- ;Simplifies special angles, such as 17/6 pi radians
- COS (17/6 pi)
-
- ;Type "DEG" after entering an angle in degrees
- SIN (-30 DEG)
-
- ;A hidden opportunity for sin^2 + cos^2 --> 1
- (SIN x)^3 + SIN x + (COS x)^2 SIN x
-
- ;Using different rules in different places
- (1 - (COS x)^2)^4 (1 - (SIN x)^2)^3 ((SIN x)^2 + (COS x)^2)^5
-
- ;Judicious extraction of phase angles
- SIN (pi / 4 + a) - SIN (0.25 (pi - 4 a))
-
- ;Judicious extraction of phase angles
- SIN (1.5 pi/2+x) / COS (pi+x) + COS ((3pi-2x)/2) / SIN (pi/2+x)
-
- ;Judicious extraction of phase angles
- SIN (pi - a) / TAN (pi + a) * COT ((pi - 2 a)/2) / TAN (pi / 2 + a) * SIN (1.5 * pi + a) / SIN (- a)
-
- ;Judicious use of multiple-angle expansion
- SIN (6 x) / SIN (3 x)
-
- ;Judicious use of half-angle transformations
- 1/(1+TAN(a)*TAN(a/2))
-
- ;Judicious use of half-angle transformations
- (COS (a/2) + SIN (a/2))^2
-
- ;Judicious use of half-angle transformations
- SIN((pi-t)/4)^2*SIN(pi/4+t/4)^2
-
- ;Simultaneous half and multiple angles
- CSC (2x) (2 (COS (x/2))^2 - 1)
-
- ;Cancellation of trigonometric GCDs
- (1 + SIN a) * (1 + SEC a) / ((1 + COS a) * (1 + CSC a))
-
- ;Judicious use of half-angle transformations
- (TAN a)^2 / (1 + (TAN a)^2) * (1 + (COT a)^2) / (COT a)^2
-
- ;Principal arctangent of a special ratio
- ATAN (2 + SQRT 3)
-
- ;ATAN (y, x) is the angle of the point (x,y)
- ATAN (-1, -1)
-
- ;Principal arcsine of a special ratio
- ASIN (-1/2)
-
- ;Principal arccosine of a special ratio
- ACOS (- 1 / SQRT 2)
-
- ;Judicious transformation of two-argument ATAN to ASIN
- ATAN (x,SQRT(1-x^2))
-
- ;Exploitation of reciprocal arguments
- ATAN (x/2 + 3) + ATAN (2/(x + 6))
-
- ;Composition of inverse functions
- TAN ATAN x
-
- ;There is also an arcsecant function
- ASEC (1/x)
-
- ;There is also an arccosecant function
- CSC ACSC x
-
- ;There is also an arccotangent function
- ACOT t + ATAN t
-