Answer:
d. m+ 3 = 15
Step-by-step explanation:
it explains you have to add m to 3 so it can't be m + 15. also, its says equals to 15 so 15 will be after the equal sign.
hope this helped... branliest please :)
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here is a trig calculator
http://www.carbidedepot.com/formulas-trigright.asp
Just
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