Question: polar function/coordinates

The last question im going to be asking for a while.

Im trying to find a function which in the form of a spiral crosses the x-axis at 45 degrees. Now i can only think of one function that fufills this, that would be the tan function since at Pi/4 it would give me 1 fulfulling my question. But making a function which fufills it not so easy, i know i have to use the polar differentiation but im having trouble inputting it into maple

Any help?

Thank you!

 

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