Question 1117559
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I'd like to make one notice (correction) to the solution by the tutor @Math_helper.


He correctly found one solution  theta_1 = 0.215 radians in Q1.


He also correctly found the other solution  theta_2 = {{{(2pi-0.215)/6}}} = 0.831 radians,  but mistakenly referred to it as to the angle of Q4.


In fact,  the angle  theta_2 lies in Q1, too.
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