# daughter have trouble finding value of x

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• Feb 6th 2011, 01:12 PM
Waffl3z
daughter have trouble finding value of x
can someone please explain how to get the value of x.

trying to help my daughter with her homework.

http://www.coolestdudealive.com/images/cassprob.jpg
• Feb 6th 2011, 01:15 PM
e^(i*pi)
Use: SOH CAH TOA to find out the correct trig ratio.

Spoiler:
$\tan(42) = \dfrac{3x+3}{4x}$

Note that $tan(42) \approx 1$ so you'd expect those two sides to be roughly equal
• Feb 6th 2011, 01:51 PM
Waffl3z
Thank you so much.
x = 5.

You are the best!
• Feb 7th 2011, 02:59 AM
cromlix
daughter have trouble finding value of x
Hi there,

tan 42 = 3x + 3/4x

4x tan 42 = 3x + 3

4x(0.9) = 3x + 3

3.6x = 3x + 3

3.6x - 3x = 3

0.6x = 3

x = 3/0.6

x = 5. Hope this helps.

Cromlix