cadez
08.09.2021 •
Mathematics
What is the image of the point (-5, -9) after a rotation of 90° counterclockwise about the origin?
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Ответ:
5,-9
Step-by-step explanation:
Ответ:
=tan (π-π/6)
=(tan π-tan (π/6))/(1+tan π tan π/6)
=-tan (π/6)
=-1/√3
=-√3/3
Hence the answer is: -√3/3