Need ..
rewrite with only sin x and cos x.

cos 2x + sin x

The answer is:

The rewritten expression is:

To solve this problem we need to use the trigonometric identity of the double angle for the cosine which states that:

Also, if we want to rewrite only with terms of cos(x) and sin(x), we can apply the following property:

So, rewriting the trigonometric equation, we have:

Then, we are given the expression:

Now, rewriting the given expression with only sin(x) and cos(x), we have:

Hence, the answer is:

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explanation:

step-by-step explanation: