Question

MATH HELP !

Answer 1

@Luis_Rivera @experimentX

Answer 2

use cosine law

Answer 3

Show me that ?

Answer 4

@lalaly

Answer 5

@cwrw238 @waterineyes

Answer 6

HELP PLEASE

Answer 7

okay so what do i have to do to get my answer ? Please help me & dont go anywhere

Answer 8

I mean to find angle J use:

\[\cos(J) = \frac{k^2 + l^2 - j^2}{2 \cdot k \cdot l}\]

Answer 9

I don't have a calculator mine just died.

Answer 10

Here put k = 7, l = 6.58, j = 10 and then solve..

Answer 11

Are you using PC??

Answer 12

no im using my phone well trying to .

Answer 13

Try, I am here only..

Answer 14

Let us go slowly..
Firstly tell,
what is k^2 ??

Answer 15

14

Answer 16

7^2 = 14??

Right??

Answer 17

right

Answer 18

Hey, 7^2 means multiply 7 two times..

Not add 7 two times..

Answer 19

sorry 49

Answer 20

\[7^2 = 7 \times 7 = ??\]

Answer 21

Yep..
now find j^2 and then l^2..

Answer 22

j = 100

Answer 23

and l^2??

Answer 24

43.2964

Answer 25

Okay..

Now find \(2 \times k \times l\)

Answer 26

2 x 49 x 43.2964 right

Answer 27

No..

Answer 28

thats what you wrote above ?

Answer 29

49 and 43.2964 are the values of k^2 and l^2 respectively..

k = 7 and l = 6.58 here..

Answer 30

You are doing for \(2 \times k^2 \times l^2\), but I am asking for \(2 \times k\times l\).

Answer 31

I'm lost. k=49 & i=43.2964 so what do you mean ?

Answer 32

See you question first, what is k and l there?

Answer 33

i old you remember we solved it

Answer 34

\(k = 7, \quad k^2 = 49\)
\(j = 10, \quad j^2 = 100\)
\(l = 6.58, \quad l^2 = 43.6924\)..

Right??

Answer 35

Correct

Answer 36

Look what is k and l here??

k and l, not \(k^2\) and \(l^2\)..

Answer 37

See our numerator wants \(k^2 + l^2 - j^2\), that is why I have squared \(j\), \(k\) and \(l\) there..

Answer 38

okay after this i will get my answer.

Answer 39

After solving post your answer here, I will check it whether it matches with my answer or not..

Just calculations left there..

Answer 40

i got 38

Answer 41

as my final answer.

Answer 42

@waterineyes

Answer 43

@waterineyes

Answer 44

Wait then..

Answer 45

am i right ?

Answer 46

I got different..

How you solved can you show first? What is in the numerator you got and why?

Answer 47

Sorry not why but how?

Answer 48

i just put everything in the caluclator what about 95 or 44 i got thoes too

Answer 49

hurry i have to go.

Answer 50

Please & thank you

Answer 51

I got 91 something..

Answer 52

i dont have 91 on my answer key i got 95

Answer 53

@waterineyes

Answer 54

Yeah that can be right..