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Sloan [31]
3 years ago
9

What is the relationship between sin(90 degrees) and sin(-90 degrees)

Mathematics
1 answer:
Volgvan3 years ago
4 0

Answer:

sin(90\°)=-sin(-90\°)

Step-by-step explanation:

we know that

sin(90\°)=1

sin(-90\°)=-1

therefore

sin(90\°)=-sin(-90\°)

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Answer:

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Step-by-step explanation:

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An observer (O) spots a plane flying at a 42° angle to his horizontal line of sight. If the plane is flying at an altitude of 15
NeTakaya

Answer:

D. 22,417 feet

Step-by-step explanation:

Fine the diagram in the attachment for proper elucidation. Using the SOH, CAH, TOA trigonometry identity to solve for the distance (x) from the plane (P) to the observer (O), the longest side x is the hypotenuse and the side facing the angle of elevation is the opposite.

Hypotenuse = x and Opposite = 15,000feet

According to SOH;

sin 42^0 = \frac{Opposite}{Hypotenuse} \\\\Sin42^0 = \frac{15000}{x}\\ \\x = \frac{15000}{sin42^0}\\\\ \\

x = \frac{15000}{ 0.6691} \\\\x = 22,417 feet

Hence the distance (x) from the plane P to the observer O is approximately 22,417 feet

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3 years ago
Boris bought 5 CDs that were each the same price. Including sales tax, he paid a total of $59.50. Each CD had a tax of $0.70. wh
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$8.40

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7 0
2 years ago
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If “x” represents the full price of an item, write an expression to represent the final cost of an item that is 20% off.
zloy xaker [14]
The expression is x -20%
3 0
3 years ago
In recent years, 23.8% of all registered doctors were female. If there were 57,800 female registered doctors that year, what was
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57,800 is 23.8% of the total number of registered doctors.

To find out the number of registered doctors, we divide the number of female doctors by 23.8% as a decimal (which is just 0.238):

57,800 ÷ 0.238 = 242,857
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Answer:

So there are 242,857 registered doctors.
6 0
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