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If cos -105º = -0.26 and csc -105º = -1.03 then , then cos 105º =? and csc 105º =? 

Guest Sep 4, 2017
 #1
avatar+86859 
+2

 

We  want to use these two identities

 

cos (x)  = cos (-x)    and      csc (-x)  = -csc (x)

 

So

 

cos (-105°)  =  cos (105°)  = -0.26

 

And

 

csc ( -105°)   =  -csc (105°) = -1.03  .....so..... - [- csc (105°) ] = csc (105°) =  - [ -1.03]  =  1.03

 

 

 

cool cool  cool

CPhill  Sep 4, 2017
 #2
avatar+702 
+4

Nice job!!!

MIRB16  Sep 4, 2017

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