Ответ:
1. 2
b^2 = a^2 + c^2 - 2 *a * c * cosb
2.4
Cosy= a^ + b^2 - c^2 / 2 *a* b
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Answers & Comments
Ответ:
1. 2
b^2 = a^2 + c^2 - 2 *a * c * cosb
2.4
Cosy= a^ + b^2 - c^2 / 2 *a* b