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+5
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Hey everyone, 

 

I dont want this problem to be solved, I want to do it myself but I'm stuck in one part, because apperently I don't know something :). 

 

So here it goes...

 

I managed to solve for A, B , C and D. And now By having this information I need to solve for E and F.

All those 3 angles adds up to 180 degrees, and both Alpha and Beta are no more than 90 degrees. 

How do I solve for last tan if I have those 2 ? Any rule I'm missing out? 

 May 12, 2016

Best Answer 

 #6
avatar+118613 
+10

ok so you have found that

A=2

B=1

C=1

D=1

now from the pic if you mark all the things you are givein you can see that

\(\theta=180-(\beta+\alpha)\\ so\\ tan\theta=tan(180-(\beta+\alpha))\\ tan\theta=-tan(\beta+\alpha)\\\)

 

Now use the expansion for tan(beta+alpha) and you will get tan theta.     

 

I think that is all you want me to help you with. :)

 

If you decide you wantr more help then just ask :)

 May 12, 2016
 #2
avatar+118613 
+5

Is there a triangle that goes with this question?

 May 12, 2016
 #3
avatar
0

Nah , I just cant do it.

 May 12, 2016
 #4
avatar+50 
0

umm sorry for not finishing the post properly, I'll just post enire question . 

 

As I said, I'm pretty sure I can do this on my own, I just need a hint on the part I've posted above.

 

If anyone interested it's from math test to get schoolarship to study natural sciences or math in Japan.

 May 12, 2016
edited by Guest  May 12, 2016
edited by Guest  May 12, 2016
edited by Guest  May 12, 2016
 #6
avatar+118613 
+10
Best Answer

ok so you have found that

A=2

B=1

C=1

D=1

now from the pic if you mark all the things you are givein you can see that

\(\theta=180-(\beta+\alpha)\\ so\\ tan\theta=tan(180-(\beta+\alpha))\\ tan\theta=-tan(\beta+\alpha)\\\)

 

Now use the expansion for tan(beta+alpha) and you will get tan theta.     

 

I think that is all you want me to help you with. :)

 

If you decide you wantr more help then just ask :)

Melody May 12, 2016
 #7
avatar+50 
0

alright, I can't finish it. I don't know where I'm wrong.

nzzska  May 12, 2016
 #8
avatar+50 
0

alright, I can't finish it. I don't know where I'm wrong.

nzzska  May 12, 2016
 #9
avatar+50 
0

nevermind, I solved it lol

 May 12, 2016

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