cbyearty56361
27.06.2019 •
Mathematics
(-2/3, sqrt5/3) is a point on a unit circle. find the cosine, cosecant, and sine of the angle.
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Ответ:
Look at the picture.
We have the right triangle x, y and r. From the Pythagorean theorem we have:
We have the point
Substitute:
Ответ:
Step-by-step explanation:
Annie's mistake is in the second step.
He introduced "k7.5" & "-7.5k" which made him confuse and led him to delete "k", thereby omitting the variable being sort after