3 years ago

Please help ASAP will give brainliest

Mathematics

1 answer:

Serjik [45]3 years ago

7 0

It’s hard to see it shoyld take another pic

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Find the exact value of the trigonometric expression given that sin(u) = -(3/5),

GuDViN [60]

Recall that

$\cot(u+v)=\dfrac{\cos(u+v)}{\sin(u+v)}=\dfrac{\cos u\cos v-\sin u\sin v}{\sin u\cos v+\cos u\sin v}=\dfrac{\cot u\cot v-1}{\cot v+\cot u}$

Also, recall that for all $\theta$ ,

$\cos^2\theta+\sin^2\theta=1$

With $\frac{3\pi}2$ , we can expect $\cos u>0$ , and with $0$ , $\sin v>0$ . So from the above identity it follows that

$\cos u=\sqrt{1-\sin^2u}=\dfrac45\implies\cot u=\dfrac{\cos u}{\sin u}=-\dfrac43$

and

$\sin v=\sqrt{1-\cos^2v}=\dfrac8{17}\implies\cot v=\dfrac{\cos v}{\sin v}=\dfrac{15}8$

and so

$\cot(u+v)=\dfrac{-\frac43\frac{15}8-1}{\frac{15}8-\frac43}=\boxed{-\dfrac{84}{13}}$

6 0

3 years ago

What is 20 shares of stock bought at 10 1/2 ?

Aloiza [94]

Just multiply 20 by 10 1/2. When you multiply it out, you should get 210 as your final answer.

3 0

3 years ago

Help me please i will give brainliest

AlekseyPX

Answer:

Step-by-step explanation:

Number 13:

a+b=3+4

= 7

Number 14:

c-a= 12-3

= 9

Number 15:

a+b+c= 3+4+12

= 19

8 0

3 years ago

What is 5(4x+3)= simplified

cluponka [151]

5(4x+3)=0

20x+15=0

20x = -15

$x = \frac{ - 15}{20}$

$x = \frac{ - 3}{4}$

4 0

3 years ago

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mars1129 [50]

What???????? Lol I don’t get it

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3 years ago

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