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aleksklad [387]
3 years ago
15

Simplify the expression using the appropriate identities. (Do not use calculator)

Mathematics
1 answer:
bezimeni [28]3 years ago
6 0

Answer:

sin -1 degrees.

Step-by-step explanation:

sin (A - B) = sin A cos B - cos A sin B

Therefore  sin 9° cos 10°- cos 9º sin 10° = sin (9 - 10)

= sin -1 degrees.

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0.25+(2.9 times 10^-3
gayaneshka [121]

Answer: .2529

Explanation:

1) 10^-3= .001

2).001*2.9=.0029

3) .25+.0029= .2529

6 0
3 years ago
Read 2 more answers
If angle A measures 90 degrees and angles B and C measure 45 degrees and side AC measures 12 ft, find the length of side BC. Ple
kondor19780726 [428]
Since the angle are both 45 degrees, then you know that both legs are equal=12.  
so to find the hypotenuse, you use the pythagorean theorem:

12^2+12^2= c^2
144+144=c^2
288=c^2
square root(144) x square root (2)=c
12 square root 2 is the answer, so D.
6 0
3 years ago
2x/3x^3 in a simplest form?
ASHA 777 [7]

Answer:

2/3x^2

Step-by-step explanation:

5 0
3 years ago
How many 3/4 can fit into 3?
dolphi86 [110]

Answer:

3

Step-by-step explanation:

6 0
3 years ago
Jamal filled his gas tank and then use 7/16 of the tank for traveling to visit his grandfather. He then used 1/3 of the remainin
Lisa [10]

Answer:

\frac{3}{8}

Step-by-step explanation:

Let's tackle each statement at a time:

<em>Jamal filled his gas tank of which he used \frac{7}{16}.</em>

We need to express the unit (a gas tank) in terms of fractions so that we can substract 1-\frac{7}{16}.

The denominator of the second term of our substraction is 16, so we can express the first term as \frac{16}{16}. Now that we have the same denominator in both terms, we can proceed to define 16 as a common denominator and rewrite the expression as: \frac{16-7}{16}, which gives us a result of \frac{9}{16}, which is what Jamal has left after visiting his grandfather. This expression cannot be simplified anymore.

<em>Then, he used \frac{1}{3} of the remaining \frac{9}{16}.</em>

We express it as if he had \frac{2}{3} of the remaining <em>\frac{9}{16}.</em>:

\frac{9}{16} *\frac{2}{3}

We multiply the terms:

\frac{18}{48}

And simplify:

\frac{9}{24}

\frac{3}{8}

So, at the end, Jamal has \frac{3}{8} of his tank left.

6 0
3 years ago
Read 2 more answers
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