Using Euler's formula to verify cos(x+y)=cosxcosy-sinxsiny

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Using Euler's formula to verify cos(x+y)=cosxcosy-sinxsiny
#euler #trigonometry
In this video, we will use Euler's formula to verify that cos(x+y) = cosxcosy - sinxsiny.
Whether you're a trigonometry student or a math enthusiast, this video will help you comprehend the link between trigonometric functions.
So take a seat, grab a pen, and let's get started!"
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that was the best and must easiest proof for this formula great job

danysenpai