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26-03-2021
Mathematics

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If cos(theta)=-1/2 and sin(theta)>0 what is theta?

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26-03-2021

Answer:

120 degrees

Step-by-step explanation:

sin of 30 is 1/2 and cos 60 is 1/2

however, since it is negative, you have to use the reference angle in reverse, so it would be 180-60 = 120 degrees.

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