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Do you know the trigonometric identities? Sin and cosine?
cosine =adjustment/hypotenuse right
cos 50=x/90
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 \(B=90\cos a\).
cost 50=confused
cos 50=x/90
Yes. Multiply both sides by \(90\).
you multiply 50x90 right
No, you multiply 90 by cos 50.
i got 4,500
i got 86.87
That sounds off.
im not sure
Do you know how to do \(90\times\cos50\)?
cosx50 right
No, \(\cos\) is an operation.
im getting 4,500 for some reason
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.
im getting 50
i did cos 50
if i do 50 cos=0.9649
It's not a multiplication.
im getting 50
i click on cos and than i put 50 so i got 50
I have no idea what you're talking about. You sound confused. Do you know what \(\sin x\) is?
yes on calculator
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.
@swissgirl @bahrom7893 I can't tell what the confusion here is. Help me!
@nincompoop You are a better teacher.
Ok well on your calculator you should have this button called sin, cos and tan correct?
allrrighhttyy so on your calculator type 90*Cos(50) then press enter
ohhhh u r on radians. You gotta set your calculator to degrees
oh that's the problem
i dont know why im getting 4,500
what i did is 90xcos50
you don't multiply when its cos(50) right
90*50=4500 But we are typing 90*Cos(50) remember to include the Cos
ok i was using my iphone calculator that's why it wasnt working now im using internet cal and i got57.85
so what's next
idk ask bad
Ask @nincompoop ... I have a terrible headache.
The cosine of a 50° angle is ____
The second most powerful. Most powerful is undoubtedly CleverBot. :P
Unfortunately, CleverBot is not programmed to give you right answers. Just data mine a lot.
ok who i should ask for help
Ugh, I don't know how to help because it seems you aren't clear about what you're confused on.
i wasnt using the right calculator
now i got it

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