1. (cos127° - 3sin323° + cos630°) / (sin37°) 2. Если tga = 5√3, то чему равно (3cos(pi/3-a)) / (cosa)
3. 9tg(arccos3/5)=?
4. Если х принадлежит [0;2],       то           |x-3|+|x+1|-3 (упростить)
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