cosegovia
cosegovia
11-04-2018
Mathematics
contestada
if sin of beta = 4/7, what is cos of beta?
Respuesta :
mkryukova19
mkryukova19
11-04-2018
sin²β +cos²β=1
cos²β=1-sin²β
cos²β=1-(4/7)²
cos²β=1-16/49=49/49-16/49=33/49
cosβ=√33/√49=
√33/7
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