By using The half-angle formula
cos X/2 = ±√[(1 + cos X)/ 2]
But we have cos x=2/3
= ±√[(1 + 2/3)/ 2]
= ±√[(5/3 )/ 2]
= ±√[(5/5]
=±√1
Therefore answer is ±1
cos A/2 = ±√[(1 + cos A )/ 2]
Answer: x=316 and y=41
Step-by-step explanation:
1. x+y=357
2. x-y=41
3. x+y=357
<u>x-y=41</u>
x=316 y= 41
Since the equation has a absolute value in it, the equation will be reflected over the axis of symmetry, which just so happens to be the y-axis in this case. (The answer is c).
no 28
solution
(AB)=100
ABC+CBD=100
4x+2+3x-7=100
7x-5=100
7x=100+5
x=105/7
x=15
(CBD) =3x-7
3(15)-7
45-7
38
Step-by-step explanation:
by using above information
Answer:
Precent Increase
Step-by-step explanation:
