What is the value of w?

A 7
B 3.5
C 7√3
D 14

will post attachment in a sec.

Question

What is the value of w?

A 7
B 3.5
C 7√3
D 14

will post attachment in a sec.

deercult · Answer

attachment

rishavraj · Answer

$$\cos \theta = \frac{ adjacent  }{ hypotenuse }$$

deercult · Answer

Oh, wait, ok. so..

$$\cos 30 = 7\sqrt{3}\div w$$

?
@rishavraj

rishavraj · Answer

rishavraj · Answer

yup :)) good work @deercult

rishavraj · Answer

$$\cos ~30 = \frac{ 7\sqrt3 }{ w }$$

rishavraj · Answer

so whts the value of cos30??

deercult · Answer

Right now it's just:

$$\frac{ 7\sqrt{3} }{ w }$$

We have to find w to figure that one out, yes?

deercult · Answer

Sorry if I'm missing the point x(

rishavraj · Answer

u know 
$$\cos 30 = \frac{ \sqrt3 }{ 2 }$$

rishavraj · Answer

so 
$$\frac{ \sqrt3 }{ 2 } = \frac{ 7\sqrt3 }{ w }$$

deercult · Answer

so,

$$w \sqrt{3} = 2*7\sqrt{3}$$

$$w \sqrt{3} = 14\sqrt{3}$$

Yes? You cross multiply right?

deercult · Answer

@rishavraj  Is it 14?

deercult · Answer

Yep, it was. :Y Thanks a ton, dude