Find the derivative of 2sint+sin2t.
I think the answer is 2cost+cos2t(2) but the answer is wrong.

Question

Find the derivative of 2sint+sin2t.
I think the answer is 2cost+cos2t(2) but the answer is wrong.

sleepyhead314 · Answer

is that a  2sin(t) + sin²(t)
or a 2sin(t) + sin(2t) ?

anonymous · Answer

2sin(t) + sin(2t)

sleepyhead314 · Answer

yeah, then what you got was correct. did you try reordering it? http://www.wolframalpha.com/input/?i=derivative+of+2sin%28t%29+%2B+sin%282t%29

anonymous · Answer

I mean the actually question asks to find the velocity of the particle when t=3secs. They give me the equation s(t)=2sin(t) + sin(2t). So I found the first derivative and plug in 3, but i dont get the answer -0.06 m/s

sleepyhead314 · Answer

http://www.wolframalpha.com/input/?i=2+%28cos%28t%29%2Bcos%282+t%29%29+when+t%3D3 http://www.wolframalpha.com/input/?i=2cost%2Bcos2t%282%29+when+t%3D3 maybe you just plugged in wrong then? :/

anonymous · Answer

lol, i guess so. thanks anyways :P

anonymous · Answer

Would I put my calc in rads?

sleepyhead314 · Answer

yes! lol xD always use radians in calculus class XP

anonymous · Answer

it is in radians thoughhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh :(

anonymous · Answer

oooo, i got it, lol thanks :)

sleepyhead314 · Answer

lol xD glad I could help