All categories

2 years ago

What is the square root of -1?

Mathematics

2 answers:

pickupchik [31]2 years ago

6 0

Answer:

Unit Imaginary Number or i

mojhsa [17]2 years ago

4 0

Answer:

Step-by-step explanatidk

ion:

You might be interested in

What type(s) of symmetry does this figure have?

NeTakaya

It has reflectional symmetry

7 0

2 years ago

Read 2 more answers

Solve these 3 quadratic equations

Studentka2010 [4]

Answer:

follow me

Step-by-step explanation:

enjoy your now nice study

4 0

2 years ago

Find the distance between the points (13,5) and (10,1)

ElenaW [278]

The distance is (3,4)

Simply subtract the x and y functions.

13 - 10 = 3

5 - 1 = 4

8 0

2 years ago

Exact value of cos45

Anit [1.1K]

It's a value you should probably memorize:

$\cos45^\circ=\dfrac{\sqrt2}2=\dfrac1{\sqrt2}$

You can derive it using some trigonometric identities, other known values of cosine, and properties of the cosine function. For example, using the double angle identity for cosine:

$\cos^2x=\dfrac{1+\cos2x}2$

If $x=45^\circ$ , then

$\cos^245^\circ=\dfrac{1+\cos90^\circ}2$

and you probably know that $\cos90^\circ=0$ , so

$\cos^245^\circ=\dfrac12$

When we take the square root, we should take the positive root because $\cos x>0$ whenever $0^\circ$ :

$\cos45^\circ=+\sqrt{\dfrac12}\implies\cos45^\circ=\dfrac1{\sqrt2}$

4 0

2 years ago

PLEAS HELP ME QUICK I WILL GIVE BRAINLY

Anna007 [38]

Answer:

length of rectangle(l)=x

breadth(b)=5

perimeter of rectangle=2(l+b)=2(X+5)=2X+10

area if rectangle= l×b=X×5=5x.

plz give me brainliest

5 0

2 years ago