Omar wants to determine cos(- (2pi)/3) using the ratios of the 30 degrees – 60 degrees – 90 degrees right triangle . How shoulc he use this

Question

Omar wants to determine cos(- (2pi)/3) using the ratios of the 30 degrees – 60 degrees – 90 degrees right triangle . How shoulc he use this information to determine cos(- (2pi)/7)

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Thu Cúc 4 years 2021-07-21T14:09:05+00:00 1 Answers 364 views 0

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  1. ThanhThu
    0
    2021-07-21T14:11:01+00:00
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    Answer:use the reference angle if a 30°and the fact that -2pi/3 is in the 3rd quadrant to determine coz

    Step-by-step explanation:

    i dont know if this is right just an educational guess, came here looking for the answer but couldn’t find it so

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