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4 years ago

If sin42 degrees = 2/3 then cos48 degrees = what? If tan20.5= 3/8, the tan69.5= what?

Mathematics

1 answer:

Anna11 [10]4 years ago

5 0

Big ifs, question writers. These are of course approximations.

The "co" in cosine comes from complementary angles. It means since

$42^\circ + 48 ^\circ = 90^\circ$

$\sin 42^\circ = \cos 48^\circ$

Answer: cos 48° = 2/3

Similarly,

$20.5^\circ +69.5^\circ = 90^\circ$

$\tan 69.5^\circ = \cot 20.5^\circ = \dfrac{1}{\tan 20.5^\circ} = \dfrac 8 3$

Answer: tan 69.5° = 8/3

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What is (5 hundreds 5 tens) x 10 in unit and standard form

Ilia_Sergeevich [38]

In unit form: 5 ones thousands 5 hundreds
In standard form: 5,500

<h3>Further explanation:</h3>

Problem: (5 hundreds 5 tens) x 10

Question: what is the result in unit and standard form

This is a problem with place value. In standard form, 5 hundreds 5 tens are 550.

Let's do the multiplication first.

Hence,

$\boxed{ \ = (5 \ hundreds \ 5 \ tens) \times 10} \ }$
$\boxed{ \ = 550 \times 10} \ }$
$\boxed{\boxed{ \ = 5,500} \ }}$

Now consider the result. Let's write the result in unit form and standard form.

In unit form: 5 ones thousands 5 hundreds
In standard form: 5,500

Remember these

A standard form ⇒ is written in number form
Unit form ⇒ writing a number using place value units

Another example

What is (5 hundreds 5 ones) x 10 in the unit and standard form?

In standard form, 5 hundreds 5 ones is 505.

Hence,

$\boxed{ \ = (5 \ hundreds \ 5 \ ones) \times 10} \ }$
$\boxed{ \ = 505 \times 10} \ }$
$\boxed{\boxed{ \ = 5,050} \ }}$

Let's write the result in unit form and standard form.

In unit form: 5 ones thousands 5 tens
In standard form: 5,050

<h3>Learn more</h3>

What 3 digits are in the units period of 4,083,817 brainly.com/question/558692
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Keywords: what is, (5 hundreds 5 tens) x 10, 550, in unit form and standard form, millions, thousands, hundreds, tens, ones, place value, number form, 5,500

8 0

4 years ago

Jace walked a total distance of StartFraction 5 Over 6 EndFraction of a mile to school this week. If he walked the same distance

xxMikexx [17]

He walks 5/6 of a mile each day.

Multiply the distance each day by the number of days:

5/6 x 5

When multiplying a fraction by a whole number, multiply the numerator ( top number) by the whole number and leave the denominator ( bottom number as is)

5/6 x 5 = (5 x5)/6 = 25/6 now rewrite as a proper fraction:

25/6 = 4 1/6 total miles.

8 0

3 years ago

Read 2 more answers

What is the value for 19 - 6x = y when x = 7 ?<br><br> 6<br> 13<br> -23<br> 32

Nutka1998 [239]

Answer: -23

Step-by-step explanation:

19 - 6(7) = y

19 - 42 = y

y = -23