PtQtR=180
cos (QR-P) tcas (R+P-Q) + cos(P+Q-R)
sin²p+heas P. cos Q. cas R+ cos²p...
![subject](/tpl/images/cats/mat.png)
Mathematics, 14.05.2021 09:50 VamPL
PtQtR=180
cos (QR-P) tcas (R+P-Q) + cos(P+Q-R)
sin²p+heas P. cos Q. cas R+ cos²p
![ansver](/tpl/images/cats/User.png)
Answers: 3
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