+0  
 
0
116
2
avatar

sin(70°) =

 

A) sin(50°)cos(20°) − cos(50°)sin(20°)

B) sin(50°)cos(20°) + cos(50°)sin(20°)

C) cos(50°)cos(20°) − sin(50°)sin(20°)

D) cos(50°)cos(20°) + sin(50°)sin(20°)

E) cos(20°)sin(20°) − sin(50°)cos(50°)

 Oct 2, 2019
 #1
avatar+19908 
0

sin(α + β) = sin(α) cos(β) + cos(α) sin(β)

 Oct 2, 2019
 #2
avatar+1399 
0

it's B correct ?

macabresubwoofer  Oct 2, 2019

43 Online Users

avatar