Mathematics, 28.09.2019 17:50 carrottopsadly
Cos (x + π/ 3) + cos (x - π/ 3) = 1 solve for "x" on the interval [0, 2pi)
Answers: 1
![\bf cos\left( x+\frac{\pi }{3} \right)+cos\left( x-\frac{\pi }{3} \right)=1\\\\ -----------------------------\\\\\ [cos(x)cos\left( \frac{\pi }{3} \right)\underline{-sin(x)sin\left( \frac{\pi }{3} \right)}] + [cos(x)cos\left( \frac{\pi }{3} \right)\underline{+sin(x)sin\left( \frac{\pi }{3} \right)}]=1 \\\\\\](/tpl/images/0271/5910/05e95.png)
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Cos (x + π/ 3) + cos (x - π/ 3) = 1 solve for "x" on the interval [0, 2pi)...
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