A: The values of sine and cosine can only go to the range of [-1, 1]. The domain can remain infinite. The domain is also infinite as well as for the cosine. It is only their inverse properties because since cosecant and secant have asymptotes where sine are cosine are equal to zero. This is because they are recirprocals of sine and cosine, like I mentioned before. Thus, if the value of sine is 0, the value of cosecant is 1/0., which is undefined. Undefine=Asymptotes. Sine are Cosine are very much alike.
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