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# Using first principle of differentiation, find the deviation of the below function?

Y= sin x

Y = cos x

Y=x⁴+3x-2

### 3 Answers

- rotchmLv 72 months ago
Hint: Did you ever hear of Google? If you adequately type your question into Google, you will immediately get many answers, especially for the first two you asked. It will be much quicker for you that way!

- PopeLv 72 months ago
Y = sin(x)

As h → 0,

dY/dx

= lim [sin(x + h) - sin(x)]/h

= lim [sin(x)cos(h) + cos(x)sin(h) - sin(x)]/h

= lim [sin(x) - sin(x)]/h + lim cos(x)sin(h)/h

= 0 + cos(x)

= cos(x)

That was your one question allowance.

- Anonymous2 months ago
Too long to type out. Easy to find 1st two with a search.