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Harlamova29_29 [7]
3 years ago
5

Double-Angle and Half-Angle Identiies [See Attachment] Question 5

Mathematics
1 answer:
sergey [27]3 years ago
5 0

Thought I did this one but it was just very similar. Again there's a q and a theta I'm just going to assume are the same.



\sin \theta = \pm \sqrt{1 - \cos^2 \theta}


\sin \theta = + \sqrt{1 - (3/5)^2} = \frac 4 5


I picked positive because we're in the first quadrant.


\sin 2 \theta = 2 \sin \theta \cos \theta


\sin 2 \theta = 2 (\frac 4 5)(\frac 3 5) = \frac {24}{25}



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