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sin36=7/x how do you solve ?

 Mar 11, 2015

Best Answer 

 #3
avatar+118609 
+5

Thank you anon2 for answering and question asker anon for giving feed back on the answer.

Lets take a look.

 

$$sin36=\frac{7}{x}$$

multiply both sides by x

 

$$\\x\times sin36=\not{x}\times \frac{7}{\not{x}}\\\\
x\times sin36=\not{x}\times \frac{7}{\not{x}}\\\\
x\times sin36=7\\\\$$

 

divide both sides by sin36    

 

$$\\x\times sin36=7\\\\
\frac{x\times sin36}{sin36}=\frac{7}{sin36}\\\\
x=\frac{7}{sin36}\\\\$$

 

Now when you put this into the web2 calc you have to put the 36 in brackets I think

7/sin(36)=

 

$${\frac{{\mathtt{7}}}{\underset{\,\,\,\,^{\textcolor[rgb]{0.66,0.66,0.66}{360^\circ}}}{{sin}}{\left({\mathtt{36}}^\circ\right)}}} = {\mathtt{11.909\: \!111\: \!316\: \!938\: \!145\: \!1}}$$

 

so 11.9 degrees is the correct answer.

What do you think the answer should be?  Maybe we can clear up the misunderstanding?

 Mar 11, 2015
 #1
avatar
+5

sin36=7/x
isolate x: x= 7/sin36   just input it into the calculator, like this 7÷sin36 .. thats it

 Mar 11, 2015
 #2
avatar
+5

i got 11.9 which is wrong 

 Mar 11, 2015
 #3
avatar+118609 
+5
Best Answer

Thank you anon2 for answering and question asker anon for giving feed back on the answer.

Lets take a look.

 

$$sin36=\frac{7}{x}$$

multiply both sides by x

 

$$\\x\times sin36=\not{x}\times \frac{7}{\not{x}}\\\\
x\times sin36=\not{x}\times \frac{7}{\not{x}}\\\\
x\times sin36=7\\\\$$

 

divide both sides by sin36    

 

$$\\x\times sin36=7\\\\
\frac{x\times sin36}{sin36}=\frac{7}{sin36}\\\\
x=\frac{7}{sin36}\\\\$$

 

Now when you put this into the web2 calc you have to put the 36 in brackets I think

7/sin(36)=

 

$${\frac{{\mathtt{7}}}{\underset{\,\,\,\,^{\textcolor[rgb]{0.66,0.66,0.66}{360^\circ}}}{{sin}}{\left({\mathtt{36}}^\circ\right)}}} = {\mathtt{11.909\: \!111\: \!316\: \!938\: \!145\: \!1}}$$

 

so 11.9 degrees is the correct answer.

What do you think the answer should be?  Maybe we can clear up the misunderstanding?

Melody Mar 11, 2015

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