awillis2k
awillis2k
19-06-2017
Mathematics
contestada
Find all solutions to 5cosθ = 3cosθ - 1.
Respuesta :
ghanami
ghanami
20-06-2017
hello :
5cosθ = 3cosθ - 1.
5cosθ - 3cosθ = 1.
2cos
θ =1
cosθ =1/2
all solutions :
cosθ =cos
π
/3
all solutions :
θ =π/3 +2kπ or θ = - π/3 +2kπ ....k in Z
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