SushiMagic
12.03.2020 •
Mathematics
Find the vertex of the parabola
focus:(3,7) directrix: y= -1
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Ответ:
cos 30
Step-by-step explanation:
cos 30 + sin 60 / 1+ sin 30 + cos 60
= root3 / 2 + root3/2 / 1 + 1/2 + 1/2
= root 6/2 by 4/2
= root 6/4
= root 3/2
= cos 30