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softballislove3
 3 years ago
Find cos θ if sin θ = 5/13 and tan θ > 0.
softballislove3
 3 years ago
Find cos θ if sin θ = 5/13 and tan θ > 0.

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myininaya
 3 years ago
Best ResponseYou've already chosen the best response.1If sine is negative and tangent is positive, then cosine is ____?____ tangent=sine/cosine=negative/cosine=positive =>cosine is ___?____

myininaya
 3 years ago
Best ResponseYou've already chosen the best response.1So negative/positive is positive No...

softballislove3
 3 years ago
Best ResponseYou've already chosen the best response.1no its negative

myininaya
 3 years ago
Best ResponseYou've already chosen the best response.1Right. You want tangent to be positive not negative

myininaya
 3 years ago
Best ResponseYou've already chosen the best response.1So you need cosine to be negative in order for tangent to be positive since sine is negative.

myininaya
 3 years ago
Best ResponseYou've already chosen the best response.1So we are in the (,) quadrant.

myininaya
 3 years ago
Best ResponseYou've already chosen the best response.1dw:1351269639105:dw \[\sin( \theta)=5/13 \text{ is given to you} \]

softballislove3
 3 years ago
Best ResponseYou've already chosen the best response.1so then use pythagorean theorem to fine cosine

myininaya
 3 years ago
Best ResponseYou've already chosen the best response.1Find the other side using the Pythagorean thm.

softballislove3
 3 years ago
Best ResponseYou've already chosen the best response.1which would end up being 12/13

myininaya
 3 years ago
Best ResponseYou've already chosen the best response.1the other side is 12 is what you are saying and no i thought you were looking for cosine...

myininaya
 3 years ago
Best ResponseYou've already chosen the best response.1oops I labeled the triangle wrong a little bit.

myininaya
 3 years ago
Best ResponseYou've already chosen the best response.1dw:1351270002298:dw

myininaya
 3 years ago
Best ResponseYou've already chosen the best response.1And you will be correct. :)

softballislove3
 3 years ago
Best ResponseYou've already chosen the best response.1dw:1351270017306:dw
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