+0  
 
+2
162
2
avatar+212 

sinx=cos19∘

What is the value of x?

Enter your answer in the box.

x =

lysxsa  Jun 7, 2018
 #1
avatar+12558 
+2

Sin x =  cos (19)

sin x = .9455

arcsin (sin x) = x = arcsin (.9455) = 71 degrees

ElectricPavlov  Jun 7, 2018
edited by ElectricPavlov  Jun 7, 2018
 #2
avatar+86859 
+1

Here's one thing  to remember....because the sine and  cosine are  co-functions ......

 

sin (90 - x)°   = cos x°  .....so letting x  =  19°, we have that

 

sin (90 - 19)°  = cos 19°

 

sin 71°  = cos 19°

 

So....x  = 71°

 

 

cool cool cool

CPhill  Jun 7, 2018

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