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diff --git a/engine/sine.asm b/engine/sine.asm
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--- a/engine/sine.asm
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-Cosine: ; 1b0f
-; Return d * cos(a) in hl
- add $10 ; 90 degrees
-
-Sine: ; 1b11
-; Return d * sin(a) in hl
-; a is a signed 6-bit value.
-
- ld e, a
-
- ld a, [hROMBank]
- push af
- ld a, BANK(_Sine)
- rst Bankswitch
-
- call _Sine
-
- pop af
- rst Bankswitch
- ret
-; 1b1e
-