Answer:
3.45 m
Step-by-step explanation:
You want the x-component of the vector 12.0 m at 73.3°.
Components
The Cartesian coordinates of a point given in polar form can be found from ...
a∠θ = a(cos(θ), sin(θ))
This means the components of the given vector are ...
12.0∠73.3° = 12.0(cos(73.3°), sin(73.3°)) ≈ (3.448, 11.494)
The x-component is about 3.45 m.
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Additional comment
The vector values are given to 3 significant figures, so we have rounded the answer to 3 significant figures. The attached calculator display shows the value to full calculator precision, so you can round it as you may need.
<95141404393>