Answer:
x ∈ {2π/3, π, 4π/3} ≈ {2.09440, 3.14159, 4.18879}
Step-by-step explanation:
The equation can be put into standard form by adding 1:
2cos²(x) +3cos(x) +1 = 0
(2cos(x) +1)(cos(x) +1) = 0
Values of cos(x) that make this true* are ...
cos(x) = -1/2 . . . . . . . . . true for x=2π/3, x=4π/3
cos(x) = -1 . . . . . . . . . . . true for x=π
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A graphing calculator can be helpful here, too.
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* from your knowledge of the short table of trig functions and their signs in different quadrants
The answers are..................... y= -2, and x= 7
Vcylinder = πr2h
After plugging everything in you should get (3.14)(3.9)(30) this simplifies should get you 367.38m^3. Hope this helps!
Rent during the 8th year is $3072
Step-by-step explanation:
- Step 1: Rent of the apartment = $1600 Given, the rent will go up by 11.5%
⇒ 11.5% of the rent = 11.5/100 × 1600 = $184
- Step 2: Calculate the rise in rent for 8 years
⇒ 184 × 8 = $1472
- Step 3: Calculate the rent during the 8th year
⇒ 1600 + 1472 = $3072
Answer:
Step-by-step explanation:
