PreCalculus - Trigonometry (34 of 54) Graphing Sum of Trigonometry Functions (2 of 2)

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In this video I will graph the sum of the trig functions y1=cos2x and y2=2sinx.
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Thank you! Sine functions show up in many places in nature. Do these sums of sine functions show up as well? Like maybe when two electromagnetic waves or ocean waves meet? Is that what this represents? Waves meeting?

EP-rqpn
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need extended segment to show the periodicity of the combined function ???

simchabuch
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Thanks alot, our lecturer was really confusing and you helped alot.

hamedhosseini