+0  
 
0
179
1
avatar+95 

trig

 Apr 25, 2019
 #1
avatar+106539 
+2

cos ( pi/2 - x)  =  cos (pi/2)cosx + sin(pi/2) sin x  =  0*cos x + 1* sin x  =   sin x

 

So....true   !!!

 

 

cool cool cool

 Apr 25, 2019

40 Online Users

avatar
avatar
avatar