Question

Find the derivative of :

2cos(2x) + (square root of 3)

Answer 1

hint
the square root of 3 is a number, don't be fooled in to doing other saying "the derivative of a number is zero"

Answer 2

derivative of cosx = -sinx Try using the Chain rule.

Answer 3

Okay thank you, I've been told the product rule can help but it's so complicated the way my brother worked it out, I need simpler working out please and possible short cuts. ?

Answer 4

No product rule even in the problem to worry about.

Answer 5

\[\frac{ dy }{ dx } = 2\frac{ d [ \cos(2x) d(2x)]}{ dx } + 0 \]

do that

Answer 6

Not that complicated the way you wrote it. You want the derivative of
\[2\cos(2x) + \sqrt{3}\]
or do you want
\[2\cos (2x+\sqrt{3})\]
or something else?

Answer 7

The first one :D

Answer 8

So the first 2 is just a coefficient. What is the derivative of cos?

Answer 9

Okay , thanks I'll try that first 'mebs', thank you and thanks Paynesdad.

Answer 10

-4*sin(2x)