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3 years ago

Please answer I can’t retake!

Mathematics

1 answer:

soldier1979 [14.2K]3 years ago

4 0

It would be B) 6 cm. If you construct the triangle, and add the angle measure of 80 + 50= 130 , and then 180- 130= 50, you see that the triangle is isosceles.

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Find the exact values of sin(u/2) cos(u/2) and tan(u/2) given sin u=24/25 and pie/2 < u < pie

vlada-n [284]

Recall the double/half angle formulas:

$\cos^2\dfrac x2=\dfrac{1+\cos x}2$

$\sin^2\dfrac x2=\dfrac{1-\cos x}2$

We're given $\sin u=\frac{24}{25}$ , and since $u$ is between π/2 and π, we expect $\cos u$ to be negative. So from the Pythagorean identity, we find

$\sin^2u+\cos^2u=1\implies\cos u=-\sqrt{1-\sin^2u}=-\dfrac7{25}$

Also, we know $\frac u2$ will fall between π/4 and π/2, so both $\sin\frac u2$ and $\cos\frac u2$ will be positive. Then we find

$\cos\dfrac u2=\sqrt{\dfrac{1+\cos u}2}=\dfrac35$

$\sin\dfrac u2=\sqrt{\dfrac{1-\cos u}2}=\dfrac45$

and it follows that

$\tan\dfrac u2=\dfrac{\sin\frac u2}{\cos\frac u2}=\dfrac43$

8 0

4 years ago

According to this line plot, how many mealworms were measured in all

Allisa [31]

Answer:

Step-by-step explanation:

4 0

4 years ago

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What are the solutions to the equation?22 5x 12-0

saveliy_v [14]

The equestion is
2x^2-5x-12=0
we can either try to factor, or use quadratic formula
trial and errot
(x-4)(2x+3)=0
set to zero
x-4=0
x=4
2x+3=0
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6 0

3 years ago

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Every Month the average number of books borrowed by a class of 24 from a library is 4.What is the total number of books borowed

jekas [21]

Answer:

Step-by-step explanation:

24*4=96

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3 years ago

Rewrite without parentheses and simplify. (u+3)^2

blsea [12.9K]

Answer:

u^2 + 9

Step-by-step explanation:

you would have to put the exponent on the u and 3

so it would by u^2 + 3^2

but simplified it would be

u^2 + 9

we cannot simplify further since we don't know what u equals

5 0

3 years ago