Respuesta :

CastleRook
to solve the question for cos θ will be found as follows:
csc θ=-5/4
but
csc θ=1/sin θ
thus
sin θ=-4/5
thus
θ=arcsin (-4/5)
θ=-53.130
but since the value lies between 180 and 270, our value will be:
180-(-53.130)=233.16
thus
cos233.16=-0.59958



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good job