taxisoda
25.07.2019 •
Mathematics
If sin of beta = 4/7, what is cos of beta?
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Ответ:
cos²β=1-sin²β
cos²β=1-(4/7)²
cos²β=1-16/49=49/49-16/49=33/49
cosβ=√33/√49=√33/7
Ответ:
5+6+6=17
2
5+6+6=17
other also same
17+17=34
3
same
17+17+17=51