10 points help with math question?
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This is the expression written with only sinx and cosx.
<u>ANSWER</u>
<u>EXPLANATION</u>
If we have an exponential expression of the form:
then, the result is a real number, <em>if and only if n is an</em><em> </em><em>odd</em><em> number.</em>
We analyze the options and find out that,the first option is where n is odd, because we have n=7.
Hence the only option that is equivalent to a real number is
The correct choice is A.