Mathematics: Which expression is equivalent to cos 150°? our three choices are: a. cos 30° b. cos 330° c. cos (-30°) d. cos (-210°)

Which expression is equivalent to cos 150°? our - id1501766367, badatmathmate8388

Ответ:

ladybugys

30.12.2021

Mathematics

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aaron0828

15.03.2022

Mathematics

1. x=x+4 0=4this is obviously false so no solutions2. 4x+12=20 4x=8 x=23. x+5=x+(10/2) x+5=x+5 0=0this is always true so there are infinitely many solutions

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Which expression is equivalent to cos 150°?
our three choices are:
a. cos 30°
b. cos 330°
c. cos (-30°)
d. cos (-210°)

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