Core Graphics - drawing a line at an angle

I've been searching struggling with this for a while now and need some help. I just want to draw 25 lines from the centre of my display (160,200) at 14.4 degrees separation. I have been using this line of code in a for loop where x is the 14.4 degree multiplier -

    UIImage*backgroundImage = [UIImage imageNamed:@"Primate Background Only.png"];
[backgroundImage drawInRect:CGRectMake(0, 0, 320, 480)];

// Draw Outer Circle

rect = CGRectMake(0.0, 35.0, 320.0, 320.0);     
CGContextRef contextRef = UIGraphicsGetCurrentContext();                // Get the contextRef
CGContextSetLineWidth       (contextRef, 0.5);                  // Set the border width
CGContextSetRGBFillColor    (contextRef, (219.0f/255.0f), (219.0f/255.0f), (219.0f/255.0f), 0.05f);             // Set the circle fill color to GREEN
CGContextSetRGBStrokeColor  (contextRef, 0.0, 0.0, 0.0, 0.2);           // Set the circle border color to BLACK     
CGContextFillEllipseInRect      (contextRef, rect);                 // Fill the circle with the fill color
CGContextStrokeEllipseInRect    (contextRef, rect);                 // Draw the circle border

// Draw Inner Circle

rect = CGRectMake(25.0, 60.0, 270.0, 270.0);                        // Get the contextRef
CGContextSetLineWidth       (contextRef, 0.5);                  // Set the border width
CGContextSetRGBFillColor    (contextRef, (219.0f/255.0f), (219.0f/255.0f), (219.0f/255.0f), 0.25f);
CGContextSetRGBStrokeColor  (contextRef, 0.0, 0.0, 0.0, 0.2);           // Set the circle border color to BLACK     
CGContextFillEllipseInRect      (contextRef, rect);                 // Fill the circle with the fill color
CGContextStrokeEllipseInRect    (contextRef, rect);     

// Draw Segments

CGContextRef context = UIGraphicsGetCurrentContext();
CGContextTranslateCTM(context, 0.0, 0.0);           
    for (x=1; x<26; x++) {  

        CGContextSetLineWidth       (context, 0.5);
        CGContextSetRGBStrokeColor  (context, 0.0, 0.0, 0.0, 0.25);
        CGContextMoveToPoint        (context, 160, 200);                
        CGContextAddLineToPoint     (context, (160.0 * (cos((x*14.4)*(M_PI/180)))), (160.0 * (sin((x*14.4)*(M_PI/180)))));                      //  The angle is in degrees
        CGContextAddLineToPoint     (context, 200, 65);
        CGContextAddLineToPoint     (context, 160, 200);            
        CGContextStrokePath(context);                           // Why is this not showing both line color and infill?
        CGContextSetFillColorWithColor   (context, [UIColor whiteColor].CGColor);       
        CGContextFillPath           (context);
        CGContextRef context = UIGraphicsGetCurrentContext();
    }           

(I intended to post an image here but it won't permit me!)

Can someone please correct my trig functions. This is meant to draw 25 lines clockwise from 12:00 o'clock to 24:00. Instead it draws backwards only 90 degrees then returns, all lines are way out in length also.

Very grateful

Above is a bigger sample of the code used to draw tow outer circles and the interior segments as requested. I'll try and upload the image next.