#### Answer

sine, inverse

#### Work Step by Step

The statement of the question is the same as the statement above with one exception: the cosine has been replaced with co-secant. Like cosine and secant, co-secant and sine also have an inverse relationship. Keeping this in mind and comparing the two equations, we find that the first blank is satisfied by the term 'sine' while the second blank is satisfied by the term 'inverse'.