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| function _init() | |
| offsetx=240 | |
| offsety=135 | |
| x=0+offsetx | |
| y=0+offsety | |
| radius=50 | |
| theta=0 | |
| end | |
| function _update() | |
| --theta=t()/5 | |
| if btn(0) then theta-=0.005 end | |
| if btn(1) then theta+=0.005 end | |
| if btn(2) then radius+=1 end | |
| if btn(3) then radius-=1 end | |
| end | |
| function _draw() | |
| --background | |
| cls(1) | |
| line(offsetx,0,offsetx,offsety*2,16) | |
| line(0,offsety,offsetx*2,offsety,16) | |
| circ(x,y,radius,7) | |
| --hypotenuse | |
| hx=x+cos(theta)*radius | |
| hy=y+sin(theta)*radius | |
| line(x,y,hx,hy,31) | |
| --sine | |
| line(hx,y,hx,hy, 10) | |
| line(x,y,x,hy, 10) | |
| --cosine | |
| line(x,hy,hx,hy,12) | |
| line(x,y,hx,y,12) | |
| --tangent | |
| secant=x+1/cos(theta)*radius | |
| line(hx,hy,secant,y,23) | |
| --cotangent | |
| cosecant=y+1/sin(theta)*radius | |
| line(hx,hy,x,cosecant,24) | |
| print("Press \139 or \145 to change theta",10,10, 16) | |
| print("Press \148 or \131 to change radius") | |
| color(7) print("radius: "..radius) | |
| color(7) print("theta: "..theta) | |
| color(31) print("\134hypotenuse") | |
| color(10) print("\134sine") | |
| color(12) print("\134cosine") | |
| color(23) print("\134tangent") | |
| color(24) print("\134cotangent") | |
| end |
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