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2 years ago

Which statements are true regarding the development of trigonometry? Check all that apply.

Mathematics

2 answers:

love history [14]2 years ago

7 0

Answer:

all options are correct.

Step-by-step explanation:

The correct options among all the options are:

Ancient mathematicians used trigonometry to find angles of triangles.

Trigonometry is used to find the size of a missing side or angle in a right- angled triangle using the sine, cosine or tangent ratios.

Ancient mathematicians used trigonometry to track the position of the sun.

It is also used in oceanography in calculating the height of tides in oceans.

Tangent was the first trigonometric relationship used by mathematicians.

The three main functions in trigonometry are Sine, Cosine and Tangent.The functions sine, cosine and tangent of an angle are sometimes referred to as the primary or basic trigonometric functions.

Cosine was the first trigonometric relationship used by mathematicians.
Sine was the first trigonometric relationship used by mathematicians.

Leya [2.2K]2 years ago

6 0

Ancient mathematicians used trigonometry to track the position of the sun.

Sine was the first trigonometric relationship used by mathematicians

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The list shows the area in square feet of each apartment available for rent in a building. 565, 961, 867, 517, 627, 714, 517, 72

gladu [14]

STEP 1:
put numbers in order from lowest to highest
517, 517, 565, 627, 714, 728, 867, 961

STEP 2:
find the difference between the lowest and highest numbers

961 - 517= 444 ft^2 range

ANSWER: The range of the areas is 444 ft^2.

Hope this helps! :)

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2 years ago

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The sum of two positive integers, x and y, is not more than 40. The difference of the two integers is at least 20. Chaneece choo

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Chaneece chooses x as the larger number and uses the inequalities y ≤ 40 – x and y ≤ x – 20 to determine the possible solutions.

y ≤ 40 – x, if x must be between 0 and 10, y must be between 20 and 40 it is true
proof
for x=0 and y=10, y ≤ 40 – x equivalent to 10<40-0=40 it is true
x=10, y=30, y ≤ 40 – x equivalent to 30=40-10=30 it is true

the answer is A) Yes, Chaneece found the correct solution.

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2 years ago

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Step-by-step explanation:

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2 years ago

In circle A shown, BC || DE , mBC=58° and mDE=142°. Determine the measure of ZCFE . Show how you arrived at your answer.

AysviL [449]

Answer:

< CFE = 40°

Step-by-step explanation:

To better understand the solution, see attachment for the diagram.

Given:

BC parallel to DE

Measure of Arc BD = 58°

Measure of Arc DE = 142°

First step: Draw a diameter that passes through the centre of the circle and name it. In this case, the diameter is line ST.

The line ST divides the arc BD and arc DE into half.

That is:

Arc SC = 1/2(arc BC) =1/2(58)

Arc SC = 29°

Arc TE = 1/2(arc DE) =1/2(142)

Arc TE = 71°

Arc SC + Arc CE + Arc TE = 180° (Sum of angles in a semicircle

29° + Arc CE + 71° = 180°

Arc CE + 100° = 180°

Arc CE = 180-100

Arc CE = 80°

Inscribed angle = 1/2(intercepted angle)

<CFE = 1/2(Arc CE )

<CFE = 1/2(80)

< CFE = 40°

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2 years ago