Ответ:
a) 4cos a/2*cos b/2*cos y/2 = sin a + sin b + sin y
б) 4sin a/2*sin b/2*cos y/2 = sin a + sin b - sin
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Answers & Comments
Ответ:
a) 4cos a/2*cos b/2*cos y/2 = sin a + sin b + sin y
б) 4sin a/2*sin b/2*cos y/2 = sin a + sin b - sin