Last Activity: 7 Years ago
Last Activity: 7 Years ago
Q. Should be Cos 7 theta+ cos theta=Cos (8 theta- theta) + cos theta=(Cos 8 theta × cos theta - sin 8 theta × sin theta) + cos theta=(Cos π × cos theta- sin π ×sin theta) +cos theta=(-1.cos theta- 0.sin theta) + cos theta=-cos theta +cos theta=0
Last Activity: 7 Years ago
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Last Activity: 2 Years ago
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Last Activity: 2 Years ago