firdous2004 firdous2004

24-01-2020
Mathematics

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Given that cosine theta = -1/2 and theta is obtuse find sin4theta

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jimohfawwazajibola25 jimohfawwazajibola25

24-01-2020

Answer:

0.8660

Step-by-step explanation:

cosine theta = -1/2

theta = cosinearctan(-0.5)

theta = 120

sine4theta = sine 4(120)

= sine480

= 0.8660

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