С ОБЪЯСНЕНИЕМ ПОЛНЫМ
21. Найдите числовое значение выражения:
а) [tex]sin0+3cos\frac{\pi }{2} +sin^2\frac{\pi }{4}[/tex]
b) [tex]3sin\frac{\pi }{6} -2cos0+tg^2\frac{\pi }{3}[/tex]
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