On a unit circle, what is cos Θ for coordinates
%20%5Cfrac%7B%5Csqrt%7B2%7D%20%7D%7B2%7D%29" id="TexFormula1" title="(\frac{\sqrt{2} }{2} , \frac{\sqrt{2} }{2})" alt="(\frac{\sqrt{2} }{2} , \frac{\sqrt{2} }{2})" align="absmiddle" class="latex-formula">?
A) 0
B) 1
C)
D)
A) 0
B) 1
C)
D)
1 answer:
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For this case we have:
By properties of the radicals
So:
.
Now, for power properties we have:
Thus,
So:
in its radical form
Answer:
in its simplest form.
in its radical form