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3 years ago

What is the relationship between cos(90°) and cos(-90°)?

Mathematics

1 answer:

sdas [7]3 years ago

7 0

Answer:

they have the same value (0)

Step-by-step explanation:

Cosine is an even function, meaning that cos(x) = cos(-x). When x=90°, we have ...

cos(90°) = cos(-90°)

Both values happen to be zero.

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The legs of a 45-45-90 triangle have a length of 8 units. What is the length of one of its hypotenuse?

olya-2409 [2.1K]

To find the hypotenuse of a 45 45 90 triangle, multiply the leg by sq root (2)

8 * sqrt(2) = 8 * 1.4142135624 
= 11.313708499 
Source:
http://www.1728.org/trig2.htm

8 0

3 years ago

Which equation gives the number of half inches that are in 7/8 inch?

svetoff [14.1K]

7/8 divided by 1/2

copy dot flip

7/8 * 2/1

14/8

divide by 2 on top and bottom

7/4

7/8 ÷ 1/2 = 7/4

Choice A

3 0

3 years ago

The constant value of the ratio of two proportional quantities

Kitty [74]

Think it of a fraction problem,

5 0

3 years ago

What is the arc measure of minor arc AB in degrees?

Ratling [72]

Answer:

$m\widehat{AB} =55 \degree$

Step-by-step explanation:

$\because m\angle APC=m\angle DPE$

(Vertical angles)

$\therefore m\widehat {ABC} =m\widehat {DE}$

(Measure of minor arc is equal to the measure of it's corresponding central angle)

$\therefore m\widehat {AB}+m\widehat {BC} = m\widehat {DE}$

$\therefore m\widehat{AB} = m\widehat {DE} - m\widehat {BC} \\ \\ m\widehat{AB} =93 \degree - 38 \degree \\ \\ m\widehat{AB} =55 \degree$

3 0

3 years ago

Solve for p. 9(p-4) = -18 p=

agasfer [191]

Step-by-step explanation:

9(p-4) = -18

9p - 36 = -18

9p = -18 + 36

9p = 18

p= 18/9

p = 2

Check:

9 ( 2 - 4 ) = - 18

9 (-2) = - 18

- 18 = - 18

✓

3 0

3 years ago

Read 2 more answers