Krystn, a calculus student, has the answer to a homework question. The answer key has as t...

Krystn, a calculus student, has the answer to a homework question. The answer key has as the answer to the question. Does V cos x ֊ 1 j Krystn have an equivalent form of the answer, or should the calculus homework problem be redone? Show the work to justify your answer. An identity is an equation that is true for all values for which it is defined. State the restrictions on the variable for the following identities.