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castortr0y [4]
3 years ago
8

Find measurement of F to the nearest degree

Mathematics
2 answers:
stepladder [879]3 years ago
5 0
Check the picture below

if your calculator is in Degree mode, you'll get the angle in degrees, if in Radian mode, you'll get radians get taking the inverse sine, so you know

padilas [110]3 years ago
3 0

Answer:  The correct option is (A) 67.

Step-by-step explanation:  We are given to find the measurement of angle F to the nearest degree.

From the figure, we note that

Triangle FGH is aright-angled triangle with FH as the hypotenuse, where

FG = 5 units, GH = 12 units and FH = 13 units.

m∠F = ?

With respect to angle F, GH is the perpendicular and FG is the base.

From trigonometric ratios, we have

\sin m\angle F=\dfrac{perpendicular}{hypotenuse}\\\\\\ \Rightarrow \sin m\angle F=\dfrac{GH}{FH}\\\\\\\Rightarrow \sin m\angle F=\dfrac{12}{13}\\\\\\\Rightarrow \sin m\angle F=0.92307\\\\\Rightarrow m\angle F=sin^{-1}(0.92307)\\\\\Rightarrow m\angle F=67.37^\circ.

To the nearest degree, m∠F = 67°.

Thus, the measure of angle F is 67°.

Option (A) is CORRECT.

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8 = 2^3
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Step-by-step explanation:

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Evaluate the following limit, if it exists : limx→0 (12xe^x−12x) / (cos(5x)−1)
Amanda [17]

Answer:

\lim_{x \to 0} \frac{12xe^x-12x}{cos(5x)-1}=-\frac{24}{25}

Step-by-step explanation:

Notice that \lim_{x \to 0} \frac{12xe^x-12x}{cos(5x)-1}=\frac{12(0)e^{0}-12(0)}{cos(5(0))-1}=\frac{0}{0}, which is in indeterminate form, so we must use L'Hôpital's rule which states that \lim_{x \to c} \frac{f(x)}{g(x)}=\lim_{x \to c} \frac{f'(x)}{g'(x)}. Basically, we keep differentiating the numerator and denominator until we can plug the limit in without having any discontinuities:

\frac{12xe^x-12x}{cos(5x)-1}\\\\\frac{12xe^x+12e^x-12}{-5sin(5x)}\\ \\\frac{12xe^x+12e^x+12e^x}{-25cos(5x)}

Now, plug in the limit and evaluate:

\frac{12(0)e^{0}+12e^{0}+12e^{0}}{-25cos(5(0))}\\ \\\frac{12+12}{-25cos(0)}\\ \\\frac{24}{-25}\\ \\-\frac{24}{25}

Thus, \lim_{x \to 0} \frac{12xe^x-12x}{cos(5x)-1}=-\frac{24}{25}

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6. A hemispherical dome of a building needs to be
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Answer:

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Answer:

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First, we need to subtract 15 from 75, giving us 60. Then, we divide 60 by 2, giving us 30, which is the length of one part. We add 15 back to 30, which gives us 45. One part is 30 cm and the other is 45 cm

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