How do you do problem 15?

Mathematics

1 answer:

Dmitriy789 [7]3 years ago

8 0

Square out the quantity (sin + cos) and look at all the pieces. You'll find pieces equal to '1', and a piece equal to sin(2x).

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Please help will give brainliest

garri49 [273]

Answer:

$b = 17$

Step-by-step explanation:

For this triangle we have to

$a=18.2\\B=62\°\\C=48\°$

We want to find the length of b

We know that the sum of the internal angles of a triangle is 180 °

$A + 62 +48=180\\\\A=180-62-48\\\\A=70\°$

Now we use the sine theorem to find the length of b:

$\frac{sin(A)}{a}=\frac{sin(B)}{b}=\frac{sin(C)}{c}$

Then:

$\frac{sin(A)}{a}=\frac{sin(B)}{b}\\\\b=\frac{sin(B)}{\frac{sin(A)}{a}}\\\\b=a*\frac{sin(B)}{sin(A)}\\\\b=(18.2)\frac{sin(62)}{sin(70)}\\\\b=17$

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3 years ago

Evaluate the algebraic<br> expression:<br> Plz answer quick

Andrew [12]

Answer:

7,-5,-11

Step-by-step explanation:

-3(-4)-5=7

-3(0)-5=-5

-3(2)-5=-11

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3 years ago

What is the difference between exponent form and expanded form (repeated multiplication)?

Inga [223]

Expanded FormExpanded form refers to a base and an exponent written as repeated multiplication. ExponentExponents are used to describe the number of times that a term is multiplied by itself. ExpressionAn expression is a mathematical phrase containing variables, operations and/or numbers.

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3 years ago

The school cafeteria sells 5 gallons of

sasho [114]

Answer: 72 gallons

Step-by-step explanation: I added 5 and 3 then multiplied by 9.

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Read 2 more answers

Anyone know the answer?

Brut [27]

Check out the picture I've got the full explanations on there
Hope it's clear