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Мэри1999
@Мэри1999
July 2022
1
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Помогите пожалуйста a) cos (arcsin 4 / 5 ) б ) sin(arctg 8/15)
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veronikaaa17
U = arccos (- 4/5)v = arcsin 1/3sin(u + v) = sin(arccos (- 4/5)).cos(arcsin 1/3) + cos(arccos (- 4/5)).sin(arcsin (1/3)) == √[1 – (- 4/5)²] * √[1 – (1/3)²] + (- 4/5)*(1/3) = √[1 – 16/25] * √[1 – 1/9] - 4/15 == √[(9/25)*(8/9)] – 4/15 = (2√2) / 5 - 4/15 = (6√2 - 4) / 15
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Мэри1999
Что означает u и v
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