derivatives
posted by sara .
find the derivative of
y=2cotx+sec3x+cscX
find d^2/dx^2 for 1+y=x+xy

derivatives 
Reiny
The derivatives of these trig functions should be right there in your Calculus text.
for the second of your questions, I will use y' for the first derivative and y" for the second derivative i.e. y'= dy/dx
1+y=x+xy so
y' = 1 + y + xy'
y'(1x) = 1+y
y' = (1+y)/(1x)
y" = [(1x)y'  (1+y)(1)]/((1x)^2)
=[(1+y) + (1+y)]/((1x)^2) after I replaced y'
=(2+2y)/((1x)^2)
Respond to this Question
Similar Questions

math
I studied derivatives before, but kind of forgot them all, is there a website that gives me an overview of derivatives. What is first and second derivatives, how to find it, all the derivative rules and so on... thank you 
Calculus derivatives
f(a) = a + √a (a) Find the derivative of the function using the definition of derivative. 
Calculus  derivatives
Okay, I want to find the derivative of (x^x)^(x^x)... Well, I already went through the process of finding the derivative of just x^x (I used ln to do this). This is what I found... dy/dx = x^x(lnx+1) So now I want to find the derivative … 
Derivatives Math
Can someone explain how to find the derivative of : 1. y= 5^ãx / x And the second derivative of: y= xe^10x For this question I got up to the first derivative and got this y = e^10x + 10xe^10x but I can't seem to get the correct … 
math
how do i ,prove: 1/(sec x1) + 1/(sec x1)= 2cotx cscx 
math
how do i ,prove: 1/(sec x1) + 1/(sec x1)= 2cotx cscx 
Calculus (Derivatives)
Using the product rule, find the derivative of the following function: (x^1/2 cscx sinx). 
calculus
Differentiate both sides of the double angle identify sin 2x= 2 sin x cos x to determine an identify for cos x. Find the first derivative, second derivative, third fourth, fifth, sixth, seventh and eighth derivative. Use the results … 
Applied Calculus
Find the first and second derivative of the function: x/(7x+10) Using quotient rule. This is part of my homework in the section named "Higher Order Derivatives". I am confused on getting the second derivative, as I found the first … 
Derivative
Can you help me find the derivative of y= cos(x)/1+sin(x).. the / is a fraction bar. I have a hard time finding trig derivatives because I don't really know what the derivative of cos,sin ,or tan would be honestly.