Remote-processing BASIC 52 Manual do Utilizador descarregar pdf (Página 40)

RPBASIC-52 PROGRAMMING GUIDE

2-21

COS

Syntax: COS(expr)

Where: expr = numeric value up to ±200,000

Function: Returns the trigonometric co sine of expr which is in radians.

Mode: Command, run

Use: PRINT COS(PI)

Cards: All

DESCRIPTION

SIN, COS, and TAN operators use a Taylor series to calculate the function. These operators first reduce the

argument to a value that is between 0 and PI/2. the algorithm used to reduce the value will reduce accuracy

when value is large. To maintain accuracy, keep the arguments for trig functions as small as possible.

ERROR

ARITH. UNDERFLOW value or result is less than RPBASIC-52's smallest floating-point value of ±1E-127

ARITH. OVERFLOW value or result is greater than RPBASIC-52's largest floating-point value of

±.9999999E+127

DIVIDE BY ZERO Attempt to take TAN(X) when COS(PI/2) = 0

EXAMPLES

10 PRINT SIN(PI/2),COS(10*PI),TAN(8*PI/4)

20 PRINT ATN(PI)

>run

1 1 0

1.2626272

1 2 ... 35 36 37 38 39 40 41 42 43 44 45 ... 162 163

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Remote-processing BASIC 52 Manual do Utilizador Página 40