Answer:
d 10x=-3
Step-by-step explanation:
Answer:
x = theta = 0°
Step-by-step explanation:
Given the trigonometry function
Tan²x/2-2 cos x = 1
Tan²x-4cosx = 2 ... 1
From trigonometry identity
Sec²x = tan²x+1
tan²x = sec²x-1 ... 2
Substituting 2 into 1, we have:
sec²x-1 -4cosx = 2
Note that secx = 1/cosx
1/cos²x - 1 - 4cosx = 2
Let cosx. = P
1/P² - 1 - 4P = 2
1-P²-4P³ = 2P²
4P³+2P²+P²-1 = 0
4P³+3P² = 1
P²(4P+3) = 1
P² = 1 and 4P+3 = 1
P = ±1 and P = -3/4
Since cosx = P
If P = 1
Cosx = 1
x = arccos1
x = 0°
If x = -1
cosx = -1
x = arccos(-1)
x = 180°
Since our angle must be between 0 and 1 therefore x = 0°
The answer is is 4.2 because the 2 rounds up to 3 and the 3 does not round up the four so four does not round up the 2 so it is 4.2
Answer:
24. 7z^2(2z^3+1)
27. 7t (3t - 2)
30. 3a^2 (a^3-2a+4)
Step-by-step explanation:
You didnt specify what to do so i just assume this is a factorization question.
Answer:
$(12x -15)
Step-by-step explanation:
From the question;
- Sunny is paid $12 for working per hour
- Number of hours worked in a week = x
- Charges for late delivery during the week = $15
We are required to calculate his earnings in the course of the week
Therefore;
Gross amount earned = Payment per hour × number of hours
= $12 × x hours
= $12x
Net amount earned = Gross earnings - charges
= 12x - 15
Thus, the amount earned is $(12x -15)