Simplify :

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0

955

2

Simplify :

sin(3t+π)+2cos(3t)

Guest Aug 11, 2017

+9675

+2

Best Answer

$\sin(3t+\pi)+2\cos(3t)\\ =\sin(3t)\cos(\pi)+\cos(3t)\sin(\pi)+2\cos(3t)\\ =\sin(3t)\cdot(-1)+0+2\cos(3t)\\ =2\cos(3t)-\sin(3t)$

MaxWong Aug 11, 2017

MaxWong · Answer 1 · 2017-08-11T01:13:21

$\sin(3t+\pi)+2\cos(3t)\\ =\sin(3t)\cos(\pi)+\cos(3t)\sin(\pi)+2\cos(3t)\\ =\sin(3t)\cdot(-1)+0+2\cos(3t)\\ =2\cos(3t)-\sin(3t)$

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Guest · Answer 2 · 2017-08-11T07:28:45

= 2cos(3t) - sin(3t)