I need someone very good in programming to help me in a program that can give pure sine wave

okete:
I need someone very good in programming to help me in a program that can give pure sine wave

You didnt say in what specific programming language, so Ima give you options:

In Java:
package example.fixedfreqsine;

import java.nio.ByteBuffer;
import javax.sound.sampled.*;


public class FixedFreqSine {

//This is just an example - you would want to handle LineUnavailable properly...
public static void main(String[] args) throws InterruptedException, LineUnavailableException
{
final int SAMPLING_RATE = 44100; // Audio sampling rate
final int SAMPLE_SIZE = 2; // Audio sample size in bytes

SourceDataLine line;
double fFreq = 440; // Frequency of sine wave in hz

//Position through the sine wave as a percentage (i.e. 0 to 1 is 0 to 2*PI)
double fCyclePosition = 0;

//Open up audio output, using 44100hz sampling rate, 16 bit samples, mono, and big
// endian byte ordering
AudioFormat format = new AudioFormat(SAMPLING_RATE, 16, 1, true, true);
DataLine.Info info = new DataLine.Info(SourceDataLine.class, format);

if (!AudioSystem.isLineSupported(info)){
System.out.println("Line matching " + info + " is not supported.";
throw new LineUnavailableException();
}

line = (SourceDataLine)AudioSystem.getLine(info);
line.open(format);
line.start();

// Make our buffer size match audio system's buffer
ByteBuffer cBuf = ByteBuffer.allocate(line.getBufferSize());

int ctSamplesTotal = SAMPLING_RATE*5; // Output for roughly 5 seconds


//On each pass main loop fills the available free space in the audio buffer
//Main loop creates audio samples for sine wave, runs until we tell the thread to exit
//Each sample is spaced 1/SAMPLING_RATE apart in time
while (ctSamplesTotal>0) {
double fCycleInc = fFreq/SAMPLING_RATE; // Fraction of cycle between samples

cBuf.clear(); // Discard samples from previous pass

// Figure out how many samples we can add
int ctSamplesThisPass = line.available()/SAMPLE_SIZE;
for (int i=0; i < ctSamplesThisPass; i++) {
cBuf.putShort((short)(Short.MAX_VALUE * Math.sin(2*Math.PI * fCyclePosition)));

fCyclePosition += fCycleInc;
if (fCyclePosition > 1)
fCyclePosition -= 1;
}

//Write sine samples to the line buffer. If the audio buffer is full, this will
// block until there is room (we never write more samples than buffer will hold)
line.write(cBuf.array(), 0, cBuf.position());
ctSamplesTotal -= ctSamplesThisPass; // Update total number of samples written

//Wait until the buffer is at least half empty before we add more
while (line.getBufferSize()/2 < line.available())
Thread.sleep(1);
}


//Done playing the whole waveform, now wait until the queued samples finish
//playing, then clean up and exit
line.drain();
line.close();
}
}

Do they program and get sine wave? Cux I know that they have some special ic responsible for sine wave production....(Search google oga).

okete:
I need someone very good in programming to help me in a program that can give pure sine wave

Since you didn't specify what programming language you want the answer in, here are a few:

In PHP - http://php.net/manual/en/function.sin.php
<?php

// Precision depends on your precision directive
echo sin(deg2rad(60)); // 0.866025403 ...
echo sin(60); // -0.304810621 ...

?>


In Python - http://interactivepython.org/courselib/static/thinkcspy/Labs/sinlab.html
import math

y = math.sin(math.radians(90))
print(y)


In Java - http://www.wolinlabs.com/blog/java.sine.wave.html
package example.fixedfreqsine;

import java.nio.ByteBuffer;
import javax.sound.sampled.*;


public class FixedFreqSine {

//This is just an example - you would want to handle LineUnavailable properly...
public static void main(String[] args) throws InterruptedException, LineUnavailableException
{
final int SAMPLING_RATE = 44100; // Audio sampling rate
final int SAMPLE_SIZE = 2; // Audio sample size in bytes

SourceDataLine line;
double fFreq = 440; // Frequency of sine wave in hz

//Position through the sine wave as a percentage (i.e. 0 to 1 is 0 to 2*PI)
double fCyclePosition = 0;

//Open up audio output, using 44100hz sampling rate, 16 bit samples, mono, and big
// endian byte ordering
AudioFormat format = new AudioFormat(SAMPLING_RATE, 16, 1, true, true);
DataLine.Info info = new DataLine.Info(SourceDataLine.class, format);

if (!AudioSystem.isLineSupported(info)){
System.out.println("Line matching " + info + " is not supported.";
throw new LineUnavailableException();
}

line = (SourceDataLine)AudioSystem.getLine(info);
line.open(format);
line.start();

// Make our buffer size match audio system's buffer
ByteBuffer cBuf = ByteBuffer.allocate(line.getBufferSize());

int ctSamplesTotal = SAMPLING_RATE*5; // Output for roughly 5 seconds


//On each pass main loop fills the available free space in the audio buffer
//Main loop creates audio samples for sine wave, runs until we tell the thread to exit
//Each sample is spaced 1/SAMPLING_RATE apart in time
while (ctSamplesTotal>0) {
double fCycleInc = fFreq/SAMPLING_RATE; // Fraction of cycle between samples

cBuf.clear(); // Discard samples from previous pass

// Figure out how many samples we can add
int ctSamplesThisPass = line.available()/SAMPLE_SIZE;
for (int i=0; i < ctSamplesThisPass; i++) {
cBuf.putShort((short)(Short.MAX_VALUE * Math.sin(2*Math.PI * fCyclePosition)));

fCyclePosition += fCycleInc;
if (fCyclePosition > 1)
fCyclePosition -= 1;
}

//Write sine samples to the line buffer. If the audio buffer is full, this will
// block until there is room (we never write more samples than buffer will hold)
line.write(cBuf.array(), 0, cBuf.position());
ctSamplesTotal -= ctSamplesThisPass; // Update total number of samples written

//Wait until the buffer is at least half empty before we add more
while (line.getBufferSize()/2 < line.available())
Thread.sleep(1);
}


//Done playing the whole waveform, now wait until the queued samples finish
//playing, then clean up and exit
line.drain();
line.close();
}
}