2cos²x + cosx − 1 = 0
(cosx+1)(2cosx-1)=0
so cosx+1=0
or 2cosx-1=0
1) cosx+1=0
cosx=-1
x=π+2πk, k∈Z
2) 2cosx-1=0
2cosx=1
cosx=0.5
x=+-
, k∈Z
find value for the interval [0, 2 pi )
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Answer:
Answer:
A is the correct answer
please tell me if I'm wrong
I could be 7- or it could be just 7
Answer:
<h2>2a(3x² + 2x + 5)</h2>
Step-by-step explanation:
Circumference = 2
r = 2 x 3.142 x 3 = 18.852 inches.
20 mins out of 60 mins =
x18.852 =
6.28 inches