cos (arctan (1))=
arctan (1) = 45 take it to the third quadrant = add 180 = 225
cos (225) = -1 / sqrt(2)
never leave a sqrt in the denominator
= -1 /sqrt(2) * sqrt(2)/sqrt(2)
= -sqrt(2)/2
sin (arccos (1/2)
arccos (1/2) = 60 take it to the 4th quadrant -60 degrees
sin (-60)
- sin 60
- sqrt(3)/2
Answer:
see below
Step-by-step explanation:
A cubic with a positive leading coefficient will have a general trend of upward to the right. (If the leading coefficient is negative, it will trend downward.) If there is only one real zero, it will cross the x-axis exactly once. There may or may not be two turning points, but there won't be any more than that. (There may be no turning points.)
The attached graph shows a couple of examples. The turning points and inflection points may be on either side of the x-axis.
Remark
The question becomes "How long does it take her to drive 248 + 93 = 341 miles?"
Answer
Set up a simple proportion.
248/4 = 341/x Cross multiply
248 * x = 4 * 341
248 x = 1364 Divide by 248
x = 1364/248
x = 5.5 hours
But you are only asked about the 93 miles.
Answer: The number of hours for 93 miles is 5.5 - 4 = 1.5
87.3 for 3 58.2 for 2 hope it helps
Answer: 25.12 ft
To find the circumference of a circle, multiply the diameter with π (pi)
Formula: 2πr (2 × radius) (π = 3.14)
In the problem...
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We can multiply 3.14 by 8 to get the circumference.
3.14 × 8 = 25.12
Hence, 25.12 is the answer, but we can do it another way.
Let me know if you have any questions.
~ Lily, from Brainly.
<em>Note to asker: Hi there, make sure to write down these formulas!</em>
<em />
<em>Circumference: 2πr</em>
<em />
<em>Area: πr²</em>
<em />
<em>Radius: </em>
<em />
<em />
<em>Diameter: radius × 2</em>
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<em>Have a good day!</em>