Some of the questions on the ACT Math test deal with trigonometry problems. Below are some of the most useful formulas for trig ratios, radians, and identities.
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Six trig ratios:  
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Formula for radians:  
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Five trig identities:  
Some of the questions on the ACT Math test deal with trigonometry problems. Below are some of the most useful formulas for trig ratios, radians, and identities.
Six trig ratios:

Formula for radians:

Five trig identities:
