marelinatalia2000
15.10.2019 •
Mathematics
Idon't have a clue
solve for x, 0° ≤ x ≤ 360°. write degree measurements in ascending order.
cos 2 x+cos²x=1 x =
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Ответ:
First of all, we can use the double angle identity to write
The equation becomes
Divide both sides by 3 to get
And finally consider the square root of both terms (don't forget the double sign):
So, the solutions are
If you want x in [0,360], consider the equivalent angle
Ответ: