Question 1205834
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This equation is good to solve it mentally in your head, by applying reasoning.



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Indeed, sin(x) by modulus is never greater than 1.


Therefore, if sin^2(x) + sin(x) = 2, it may happen ONLY if sin(x) = 1.


But then x = {{{pi/2}}} is the only solution in the given interval.
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Solved.