July 2022 1 22 Report

1. Найдите корни уравнения sin(x+пи/4)+cos5x=0, удовлетворяющие условию |x|< пи/5

 

2. Вычислите: sin50* (1-2cos80*)

 

3. Упростите выражение: sin^2(a)+sin^2(b)+2sin(a)*sin(b)*cos(a+b)

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