To rewrite the expression cos(1x) and tan(1y) in terms of x and y only, we start by examining the functions involved.
Firstly, cos(1x) can be understood as a cosine function applied to 1 times x, which is just x. Therefore, we can express it simply as:
- cos(1x) = cos(x)
Next, we need to look at tan(1y). Similarly, since 1y simply refers to y, we can express tan(1y) as:
- tan(1y) = tan(y)
Putting this all together, the original expression can be rewritten in terms of x and y as:
- cos(1x) tan(1y) = cos(x) tan(y)
Thus, the expression in terms of x and y only is cos(x) tan(y).