Answer:
It is not equal and I have no idea how to explain it
Answer:
x = π/4 and 5π/4
Step-by-step explanation:
Given the expression;
2cos²x - 1 = 0
2cos²x = 0+1
2cos²x = 1
cos²x = 1/2
cos x = ±√1/2
cos x = ±0.7071
x = arccos(±0.7071)
x = ±45 degrees
Convert to radians
Sence 180° = π rad
45° = x
x = 45π/180
x = π/4
If x = -45°
Since cos is negative in the 3rd quadrant
x = 180 + 45
x = 225°
x = 225π/180
x = 45π/36
x = 5π/4
Sine (34) = opposite / 99
opposite side = .55919 * 99
opposite side =
<span>
<span>
<span>
55.35981
</span>
</span>
</span>
Adjacent side² = 99² - 55.35981²
Adjacent side² =
<span>
<span>
</span></span>
<span>
<span>
<span>
9,801
</span>
</span>
</span>
-<span><span><span>3,064.7085632361
</span>
</span>
</span>
<span><span><span>Adjacent side² =
6,736.29
</span>
</span>
</span>
Adjacent side =
<span>
<span>
<span>
82.0749
</span></span></span>
Answer:
5
Step-by-step explanation:
AC=AB+BC
so 16=x+1+x+7
which simplifies to 16=2x+8
subtract eight from both sides to get 8=2x
then divide by 2 to get that x=4
AB=x+1, which substitutes into 4+1=5
320
I am positive it's correcf
