Combine "three-leaf rose" and two lines

Questions
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1

Dear friends:

I would like to put 2 crossing 45 degree lines in this below command in order to have the “three-leaf rose” and those lines together.

PolarPlot[{0, 1, Sin[3 \]}, {\, 0, 2 \[Pi]}]

What would be the easiest way to do this? Could you help me please?

Thanks,
Ana

2

Can’t read your code. This how it shows up on my screen (firefox)

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But you can always add lines using Epilog, or combine plots using Show and many other ways. Assuming your “\” is say “x”,
you can do

z = 45 Degree;
PolarPlot[{0, 1, Sin[3 x]}, {x, 0, 2 \[Pi]},Epilog -> {Arrow[{{0, 0}, {Cos[z], Sin[z]}}],   Arrow[{{0, 0}, {-Cos[z], Sin[z]}}]}]

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3

Please, Could I have lines instead of arrows?Complete lines. Thank you

4

Yes, simply change the word “Arrow” by the word “Line” and now Mathematica will plot a line instead of an arrow.