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TRIG Equalities 1
Contributed by: Heseltine
__1. cos(-x)A. =cos(-x)
__2. cos(180°-x)B. =-sin(-x)
__3. cos(x)C. ≠sin(-x)
__4. sin(-x)D. =-tan(x)
__5. sin(90°-x)E. =sin(x)
__6. sin(180°-x)F. ≠-cos(x)
__7. sin(x)G. =-cos(x)
__8. tan(-x)H. =tan(x)
__9. tan(180°+x)I. =cos(x)
__10. tan(x)J. =tan(x+360°)
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