B.
It can first be factored by splitting to:
(x + 1)(x^2 +4)
And (x^2 + 4) splits to x +/- 2i
The fraction 5/8 is also the equation of 5 divided by 8, so we just do 5 divided by 8, which is
0.625 as a decimal.
The first option is the correct answer.
Answer:
Use the formula Tn=a+(n-1)d
a= the first term in the sequence which is - 1
d=the difference between the terms which is 4
Tn= -1+(n-1)(4)
Tn=-1+4n-4
Tn=4n-5
9514 1404 393
Answer:
cos(θ) = -12/13
csc(θ) = -13/5
Step-by-step explanation:
The relation between the cot and csc is ...
cot² + 1 = csc²
The signs of the cot and sec tell you this is a 3rd quadrant angle, where cos and csc are both negative.
Then ...
csc(θ) = -√(1 +(12/5)²) = -√(169/25)
csc(θ) = -13/5
__
cos(θ) = cot(θ)/csc(θ) = (12/5)/(-13/5)
cos(θ) = -12/13
