All categories

3 years ago

What is the value of K?

Mathematics

1 answer:

asambeis [7]3 years ago

8 0

Answer: 34+89=7464668+684967676734(64774)+634876=<563576763>6783876783<+>74979894=738938477482738978e9827897279

Step-by-step explanation:

You might be interested in

A spinner is evenly divided into 8 equal areas and numbered from 1 through 8. What is the probability of spinning a number less

elena-s [515]

less than 3 is a 1 or 2

probability of 1 or probability of 2

1/8 + 1/8

2/8

= 1/4

Answer: 1/4 = .25

5 0

3 years ago

What is 0.5 as a percent?

Hunter-Best [27]

Answer:

50% that shud be it......

8 0

3 years ago

Read 2 more answers

Show that √(1-cos A/1+cos A) =cosec A - cot A

Gennadij [26K]

Hi there!

$\sqrt{\frac{1-cosA}{1+cosA}} =$

We can begin by multiplying by its conjugate:

$\sqrt{\frac{1-cosA}{1+cosA}} * \sqrt{\frac{1+cosA}{1+cosA}} = \\\\\sqrt{\frac{(1-cosA)(1 + cosA)}{(1+cosA)(1 + cosA)}} =$

Simplify using the identity:

$1 - cos^2A = sin^2A$

$\sqrt{\frac{(1-cos^2A)}{(1+cosA)^2}} =\\\\\sqrt{\frac{(sin^2A)}{(1+cosA)^2}} =$

Take the square root of the expression:

${\frac{sinA}{1+cosA} =$

Multiply again by the conjugate to get a SINGLE term in the denominator:

${\frac{sinA}{1+cosA} * {\frac{1-cosA}{1-cosA} =\\$

Simplify:

${\frac{sinA(1-cosA)}{1-cos^2A} =$

Use the above trig identity one more:

${\frac{sinA(1-cosA)}{sin^2A} =$

Cancel out sinA:

${\frac{(1-cosA)}{sinA} =$

Split the fraction into two:

${\frac{1}{sinA} - \frac{cosA}{sinA} =$

Recall:

$1/sinA = cscA\\\\cosA/sinA = cotA$

Simplify:

$\frac{1}{sinA} + \frac{cosA}{sinA} = \boxed{cscA - cotA}$

5 0

2 years ago

Two times the first number added to the second number is -7

hodyreva [135]

2a+b=-7
5a+b=-13

b=-2a-7
5a-2a-7=-13
3a=-6
a=-2=first number

2(-2)+b=-7
-4+b+-7
b=-3=second

8 0

3 years ago

Can so.one help me with these 2 questions please

Fynjy0 [20]

Answer:

eeeeeeeeeeeeeeeeeeeeeeeeeeeeeee

eeeeeeeeeeeeeeeeeeeeeeStep-by-step explanation:

4 0

3 years ago