Ask question

Ask question

All categories

3 years ago

5

How do we know the angle of 45 degrees is always equal to the square root of 2 over 2?

1 answer:

stellarik [79]3 years ago

8 0

The question is not correct, you mean the the sine and cosine of 45 degrees is always square root 2 over 2.

Well you need to know how the sine and cosine are calculated. I would search in google for "sine and cosine in a unit circle". There is a very good Khan academy video that explains this in 10 minutes. Watch and learn :-)

You might be interested in

The sum of half a number, n, and 15 is 24. what is the vaule of the number n

kiruha [24]

Answer:

n = 18

Step-by-step explanation:

n/2 + 15 = 24

n/2 = 9

n = 18

8 0

3 years ago

Please help asap!!!!

igor_vitrenko [27]

Answer:

$m\widehat {MP} =46\degree$

Step-by-step explanation:

By inscribed angle theorem:

$m\angle MQP=\frac{1}{2} \times \widehat {MP}$

$23\degree =\frac{1}{2} \times m\widehat {MP}$

$23\degree \times 2= m\widehat {MP}$

$m\widehat {MP} =46\degree$

7 0

3 years ago

Solve the equation.<br> -7= z/3

Mariana [72]

Step-by-step explanation:

$- 7 = \frac{z}{3} \\ by \: cross \: multiplication \\ z = - 7 \times 3 \\ z = - 21$

7 0

3 years ago

Read 2 more answers

Solve.... 4n- 9= 2 (5+ 2n)

timama [110]

Answer:

Step-by-step explanation:

Here you go mate

Use PEMDAS

Parenthesis,Exponent,Multiplication,Division,Addition,Subtraction

Step 1

4n-9=2(5+2n) Equation/Question

Step 2

4n-9=2(5+2n) Remove parenthesis

4n-9=4n+10

Step 3

4n-9=4n+10 Subtract 4n to sides

-9=10

Step 4

-9=10 Add 9

0=19

Answer

No solutions

Hope this helps

3 0

3 years ago

Amaya is excited to go to the used video game store to buy a game system later today. The game system usually costs x dollars, b

Ksenya-84 [330]

Answer:

x(85/100)

Step-by-step explanation:

100-15 = 85

x(85/100)

5 0

3 years ago

Read 2 more answers