I think it would be 186. hope it helps
Answer:
y = ![\frac{22}{x}](https://tex.z-dn.net/?f=%5Cfrac%7B22%7D%7Bx%7D)
Step-by-step explanation:
given that y varies inversely with x then the equation relating them is
y =
← k is the constant of variation
To find k use the condition x = 2 when y = 11
k = yx = 11 × 2 = 22
y =
← equation of variation
Answer:
Step-by-step explanation:
4x^2-8x-5=0
The discriminant is the number under the √. In this case it's 144
Answer:
![cos (30) =\sqrt{\frac{3}{2} } =0.8660](https://tex.z-dn.net/?f=cos%20%2830%29%20%3D%5Csqrt%7B%5Cfrac%7B3%7D%7B2%7D%20%7D%20%3D0.8660)
Step-by-step explanation:
By using the cos square identity in trigonometry i.e., cos2ϴ = 1 – sin2 ϴ, we can evaluate the exact value of cos(33 ). For calculating the exact value of cos(∏/6), we have to substitute the value of sin(30°) in the same formula.
cos(30°) = √1 – sin230°
The value of sin30° is 1/2 (Trigonometric Ratios)
cos(30°) = √1 – (1/2)2
cos(30°) = √1 – (1/4)
cos(30°) = √(1 * 4 – 1)/4
cos(30°) = √(4 – 1)/4
cos(30°) = √3/4
Therefore, cos(30°) = √3/2