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Novosadov [1.4K]

3 years ago

9

Can someone please answer this

1 answer:

horrorfan [7]3 years ago

7 0

For this question the answer is B!!

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What are the mensure of 1 angle and 2 angle? Show ur work or explain

STatiana [176]

Answer:

angle 1 = 105º

angle 2 = 75º

Step-by-step explanation:

angle 2 = 75º

corresponding angle to the 75º angle

angle 1 = 105º

it's supplementary to angle 2

180 - 75 = 105

6 0

3 years ago

3r + 6y - 2z = -6 2x + y + 4z = 19 -5x - 2y+8z = 62<br>solve each system of equations

nadya68 [22]

For the first equation

8 0

3 years ago

PLEASE HELP<br> what is the value of x in the diagram?<br> a. 15<br> b. 5 2/5<br> c. 19<br> d. 3/5

vichka [17]

I'm pretty sure the answer is A) 15 I could be wrong though

5 0

3 years ago

Read 2 more answers

Solve the equation for all real values of x.<br> cosxtanx - 2 cos x=-1

IceJOKER [234]

Solution to equation $cosxtanx - 2 cos^2 x=-1$ for all real values of x is $x=2k\pi + \frac{\pi}{6} , x=2k\pi + \frac{5\pi}{6}$ .

<u>Step-by-step explanation:</u>

Here we have , $cosxtanx - 2 cos^2 x=-1$ . Let's solve :

⇒ $cosxtanx - 2 cos^2 x=-1$

⇒ $cosx(\frac{sinx}{cosx}) - 2 cos^2 x=-1$

⇒ $sinx = 2 cos^2 x-1$

⇒ $sinx = 2 (1-sin^2x)-1$

⇒ $sinx = 1-2sin^2x$

⇒ $2sin^2x+sinx-1=0$

By quadratic formula :

⇒ $sinx = \frac{-b \pm \sqrt{b^2-4ac} }{2a}$

⇒ $sinx = \frac{-1 \pm \sqrt{1^2-4(2)(-1)} }{2(2)}$

⇒ $sinx = \frac{-1 \pm3}{4}$

⇒ $sinx = \frac{1}{2} , sinx =-1$

⇒ $sinx = sin\frac{\pi}{6} , sinx = sin\frac{3\pi}{2}$

⇒ $x=\frac{\pi}{6} , x=\frac{3\pi}{2}$

But at $x=\frac{3\pi}{2}$ we have equation undefined as $cos\frac{3\pi}{2}=0$ . Hence only solution is :

⇒ $x=\frac{\pi}{6}$

Since , $sin(\pi -x)=sinx$

⇒ $x=\pi -\frac{\pi}{6} = \frac{5\pi}{6}$

Now , General Solution is given by :

⇒ $x=2k\pi + \frac{\pi}{6} , x=2k\pi + \frac{5\pi}{6}$

Therefore , Solution to equation $cosxtanx - 2 cos^2 x=-1$ for all real values of x is $x=2k\pi + \frac{\pi}{6} , x=2k\pi + \frac{5\pi}{6}$ .

3 0

3 years ago

Give me all the cords and I will give brain thingy

Stella [2.4K]

Answer:

B= left 6 up 7 C=left 2 up 6 D=left 3 up 2 E left 7 up 3

Step-by-step explanation:

I think this is how u do that. I'm not exactly sure but hope u get it right.

7 0

3 years ago