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Find the principal and general solutions of the equation 
Therefore, the principal solutions are x =
and
.
Therefore, the general solution is
Find the principal and general solutions of the equation 
sec x=2
cos x=1/secx=1/2
x=Π/3
cos(2Π-x)=cosx
cos(2Π-Π/3)=cos(5Π/3)=1/2
principal solutions are Π/3 and 5Π/3
cosx=cosΠ/3
x=2nΠ±Π/3 ,n∈Z, is the general solution
Find the principal and general solutions of the equation 
tanx=-1/√3
tan Π/6=1/√3
tan(Π-x)=-tanx=-1/√3
tan(Π-Π/6)=tan(5Π/6)=-1/√3
tan(2Π-x)=-tanx=-1/√3
tan(2Π-Π/6)=tan(11Π/6)=-1/√3
principal solutions are 5Π/6 and 11Π/6
tanx=tan5Π/6
x=nΠ+5Π/6, n∈Z is the general solution
Find the general solution of cosec x = –2
cosec x = –2
Therefore, the principal solutions are x =
.
Therefore, the general solution is
Find the general solution of the equation 
Therefore, the general solution is
.
Find the general solution of the equation 
Therefore, the general solution is
.
Find the general solution of the equation 
Therefore, the general solution is
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