Trigonometry Library
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Trigonometry Library

The mikroC PRO for 8051 implements fundamental trigonometry functions. These functions are implemented as look-up tables. Trigonometry functions are implemented in integer format in order to save memory.

Library Routines

sinE3

Prototype

int sinE3(unsigned angle_deg);
Returns

The function returns the sine of input parameter.
Description

The function calculates sine multiplied by 1000 and rounded to the nearest integer:

result = round(sin(angle_deg)*1000)

Parameters :

  • angle_deg: input angle in degrees

  Note : Return value range: -1000..1000
Requires

Nothing.
Example 
int res;
...
res = sinE3(45);  // result is 707

cosE3

Prototype

int cosE3(unsigned angle_deg);
Returns

The function returns the cosine of input parameter.
Description

The function calculates cosine multiplied by 1000 and rounded to the nearest integer:

result = round(cos(angle_deg)*1000)

Parameters :

  • angle_deg: input angle in degrees

  Note : Return value range: -1000..1000.
Requires

Nothing.
Example 
int res;
...
res = cosE3(196);  // result is -961
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