3D Trig Help 3 (1 Viewer)

[Andy005]

https://drive.google.com/open?id=0B_RlXPQTW1cRaHo2bDNCaWFuOFU

I'm unsure on how to approach this question and would appreciate a hint in the right direction.

Thanks for the help

 

[He-Mann]

Identify the aim (the last step). What angle do you want to find?

Identify the penultimate (second-last) step.

Identify the second-second-last step and so on, until you have an idea of what to do.

This is called working backwards and allows you to open up paths to search for the answer. It gives you direction instead of taking a stab in the dark.

 

[He-Mann]

You want to find angle FAC.

Now which trig ratio should you use to find this angle? This is the same as choosing which two sides of triangle FAC to find. Give this decision a try.

 

[1729]

https://drive.google.com/open?id=0B_RlXPQTW1cRaHo2bDNCaWFuOFU

I'm unsure on how to approach this question and would appreciate a hint in the right direction.

Thanks for the help

 

[Andy005]

Thank you