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zlopas [31]
3 years ago
11

Calculate the exact value of cos(a−b) given that sin a=12/13 with π/2

Mathematics
1 answer:
Lady bird [3.3K]3 years ago
8 0

Answer:

Step-by-step explanation:

sin ~a=\frac{12}{13} ,\frac{\pi}{2}

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Heres an ez question for yall
SSSSS [86.1K]

Answer:  Choice B

\left\{ \ 3, 5, \sqrt{34} \ \right\}

=========================================================

Explanation:

We'll be using the converse of the pythagorean theorem.

If we had a triangle with sides a,b,c and a^2+b^2 = c^2 was true, then we have a right triangle. Note: c is always the longest side

For the first answer choice we have: a = 5, b = 8, c = 12

Then,

a^2+b^2 = c^2\\\\5^2+8^2 = 12^2\\\\25+64 = 144\\\\89 = 144\\\\

which is false. This shows that we do not have a right triangle with sides 5,8,12. This rules out choice A. Choice C is a similar story.

Choice B on the other hand works because

a^2+b^2 = c^2\\\\3^2+5^2 = (\sqrt{34})^2\\\\9+25 = 34\\\\34 = 34\\\\

We have a true statement at the end, which confirms <u>choice B</u> is a right triangle.

7 0
1 year ago
A car is driving at 40 kilometers per hour. How far, in meters, does it travel in 2 seconds?
Troyanec [42]

Answer:

i think its 22.22 thats my guess

6 0
3 years ago
Read 2 more answers
Find the volume of the triangular prism described below.
Luda [366]

The volume of the prism 121.6 cube in.

Step-by-step explanation:

Given,

The base is right angle triangle whose two sides are equal.

So,

Base (b) = 8 in

Another side of right angle triangle (l) = 8 in

Height (h) of the prism = 3.8 in

To find the volume of the prism.

Formula:

V = \frac{1}{2}bhl

Now,

V = \frac{1}{2}×8×8×3.8 cube in

= 121.6 cube in.

8 0
3 years ago
What is the quotient of 2 1/4 and 5/8
Charra [1.4K]
If you would like to find the quotient of 2 1/4 and 5/8, you can calculate this using the following steps:

2 1/4 = 9/4

2 1/4 / 5/8 = 9/4 / 5/8 = 9/4 * 8/5 = 18/5 = 3 3/5

The correct result would be 3 3/5.
8 0
3 years ago
Pls answer if you only know the correct answer! Thanks! :)
Aleonysh [2.5K]

Answer:

I would say it's -0.8

Step-by-step explanation:

Since 3 is pretty far, I'm assuming -2 is at the left end of the line, so -.8 seems like the most reasonable answer.

4 0
3 years ago
Read 2 more answers
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