July 2022 1 3 Report
Помогите

Дано - cos(a) =0,6, sin(B)= -0,8, 3
[tex] \frac{3\pi}{2} < a < 2\pi[/tex]
[tex] \pi < b < \frac{3\pi}{2} [/tex]
Найти : cos (a+b) ​
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