I need help I will download question

- anonymous

I need help I will download question

- jamiebookeater

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- anonymous

@mayankdevnani

- anonymous

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- anonymous

@badreferences

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## More answers

- anonymous

Do you know the trigonometric identities? Sin and cosine?

- anonymous

cosine =adjustment/hypotenuse right

- anonymous

|dw:1349573615545:dw|

- anonymous

cos 50=x/90

- anonymous

Not so fast. So we know that \(a=50\) degrees. \(\cos a=\frac BC\). \(C\) we know is \(90\). So yes, to solve for B, you would use \(B=90\cos a\).

- anonymous

cost 50=confused

- anonymous

cos 50=x/90

- anonymous

Yes. Multiply both sides by \(90\).

- anonymous

you multiply 50x90
right

- anonymous

No, you multiply 90 by cos 50.

- anonymous

50x90=4,500

- anonymous

i got 4,500

- anonymous

\[90\cdot\cos50\neq90\cdot50\]

- anonymous

i got 86.87

- anonymous

That sounds off.

- anonymous

im not sure

- anonymous

Do you know how to do \(90\times\cos50\)?

- anonymous

cosx50 right

- anonymous

No, \(\cos\) is an operation.

- anonymous

im getting 4,500 for some reason

- anonymous

Alright, do you know what an operation is?
\(\sin x\) and \(\cos x\) are like machines into which you put a number \(x\) and retrieve a value. So do \(\cos50\) first.

- anonymous

im getting 50

- anonymous

i did cos 50

- anonymous

if i do 50 cos=0.9649

- anonymous

\(50\cos\neq\cos50\).

- anonymous

It's not a multiplication.

- anonymous

im getting 50

- anonymous

i click on cos and than i put 50
so i got 50

- anonymous

I have no idea what you're talking about. You sound confused. Do you know what \(\sin x\) is?

- anonymous

yes
on calculator

- anonymous

No, even more importantly, \(\sin x\) is an operation performed on \(x\). You're used to operations like \(+,-,\times,\div\), but \(\sin x\) is an operation like that. You can't just move the \(\sin\) around.

- anonymous

@swissgirl @bahrom7893 I can't tell what the confusion here is. Help me!

- anonymous

@nincompoop You are a better teacher.

- swissgirl

Ok well on your calculator you should have this button called sin, cos and tan correct?

- anonymous

yes

- swissgirl

allrrighhttyy so on your calculator type 90*Cos(50) then press enter

- swissgirl

ohhhh u r on radians. You gotta set your calculator to degrees

- anonymous

oh that's the problem

- anonymous

i dont know why im getting 4,500

- anonymous

what i did is 90xcos50

- anonymous

you don't multiply when its cos(50) right

- swissgirl

90*50=4500
But we are typing 90*Cos(50)
remember to include the Cos

- anonymous

ok i was using my iphone calculator that's why it wasnt working now im using internet cal and i got57.85

- swissgirl

Correct:)

- anonymous

so what's next

- swissgirl

idk ask bad

- anonymous

Ask @nincompoop ... I have a terrible headache.

- anonymous

The cosine of a 50° angle is ____

- anonymous

@lgbasallote YOU.

- anonymous

The second most powerful. Most powerful is undoubtedly CleverBot. :P

- anonymous

Unfortunately, CleverBot is not programmed to give you right answers. Just data mine a lot.

- anonymous

ok who i should ask for help

- anonymous

Ugh, I don't know how to help because it seems you aren't clear about what you're confused on.

- anonymous

ok

- anonymous

i wasnt using the right calculator

- anonymous

now i got it

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