Remote-processing BASIC 52 Uživatelský manuál stáhnout pdf (Strana 119)

RPBASIC-52 PROGRAMMING GUIDE

2-100

SIN

Syntax: SIN(expr)

Function: Returns the trigonometric S INE of expr which is assum ed to be in radians. The value of expr must be

in the range of +/- 200,000.

Mode: Command, run

Use: PRINT SIN(PI/2)

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.

ERRORS

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 ... 114 115 116 117 118 119 120 121 122 123 124 ... 162 163

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Remote-processing BASIC 52 Uživatelský manuál Strana 119