3 years ago

BDEF and DCEF are parallegrams It is true that BD = DC ? why ?

Mathematics

1 answer:

KIM [24]3 years ago

7 0

Answer:

They are parallel because all parallegrams are

it’s just math

Step-by-step explanation:

You might be interested in

Write the expression as a single logarithm

vlada-n [284]

took the test. answer is logb(y^4x^3), or A.

4 0

4 years ago

Daphne wants to buy a coat that costs $80. The store that sells the coat has multiple locations. The sales tax in each county is

juin [17]

It would cost 60 cents more.

4 0

3 years ago

Read 2 more answers

Which is an x-intercept of the continuous function in

arsen [322]

It’s (-1,0), because

5 0

3 years ago

Read 2 more answers

What is the decimal value of 1/4?

denis-greek [22]

The decimal value is 0.25

6 0

4 years ago

Read 2 more answers

URGENT HELP PLEASE!

Vaselesa [24]

Answer:

(a) $x=\dfrac{\pi}{8},\dfrac{3\pi}{8},\dfrac{9\pi}{8},\dfrac{11\pi}{8}$

(b) $x=\dfrac{3\pi}{2},\dfrac{\pi}{6},\dfrac{5\pi}{6}$

Step-by-step explanation:

It is given that $0\leq x\leq 2\pi$ .

(a)

$\sqrt{2}\sin 2x=1$

$\sin 2x=\dfrac{1}{\sqrt{2}}$

$\sin 2x=\dfrac{\pi}{4}$

$2x=\dfrac{\pi}{4},\dfrac{3\pi}{4},\dfrac{9\pi}{4},\dfrac{11\pi}{4}$ $[\because \sin x=\sin y\Rightarrow x=n\pi+(-1)^ny]$

$x=\dfrac{\pi}{8},\dfrac{3\pi}{8},\dfrac{9\pi}{8},\dfrac{11\pi}{8}$

(b)

$\csc^2 x-\csc x-2=0$

$\csc^2 x-2\csc x+\csc x-2=0$

$\csc x(\csc x-2)+1(\csc x-2)=0$

$(\csc x+1)(\csc x-2)=0$

$\csc x=-1\text{ or }\csc x=2$

$\sin x=-1\text{ or }\sin x=\dfrac{1}{2}$ $[\because \sin x=\dfrac{1}{\csc x}]$

$x=\dfrac{3\pi}{2}\text{ or }x=\dfrac{\pi}{6},\dfrac{5\pi}{6}$

Therefore, $x=\dfrac{3\pi}{2},\dfrac{\pi}{6},\dfrac{5\pi}{6}$ .

5 0

3 years ago

BDEF and DCEF are parallegrams It is true that BD = DC ? why ?​

BDEF and DCEF are parallegrams It is true that BD = DC ? why ?