posted by .

I think I have the correct answers for the following problems. For anyone who has the time I would appreciate it if you could tell me if I am correct/incorrect. Thank you.

1). Differentiate ã(x)sin x = (2xcosx+sinx)/2ã(x)

2). Differentiate 2t/(4+t^2) = (8-2t^2)/(4+t^2)^2

3). Differentiate (1-secx)/(tanx) = secx(-tan^2x + sec^2x)/(tanx)^2

4). Find equation of tangent line
y=(1+x)(cos x)

tangent line = y= x+1

5). If f(3)=4 g(3)=2 f'(3)=-6 g'(3)=5
A).(f+g)(3) = 6
B).(fg)(3) = 8
C).(f/g)(3)= -8

Note: ã(x) is supposed to be square root of x.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Simplifying with Trigonometry Identities

    Hi, I am a senior in High School having a really difficult time with two problems. I have to prove using the trigonometric identities that they equal each other but I am having a really hard time trying to get them to equal each other. …
  2. accounting, correction

    can someone correct these for me thanks. If you have a spare minutes. I'll appreciate it.... Identify whether the normal balances (in parentheses) assigned to the following accounts are correct or incorrect. a. Office supplies (Debit) …
  3. grammar

    The sentences below are based on Virginia Woolf's "The Duchess and the Jeweller." Circle the pronouns that are in the incorrect case and write the correct pronoun on the line. Write Correct if all pronouns have been used correctly. …
  4. Calculus

    Can someone help me find the derivatives of these questions?
  5. math

    I have no idea where to start! *A quick quiz consists of 3 multiple choice problems, each of which has 4 answers, only one of which is correct. If you make random guesses on all 3 problems, (a) What is the probability that all 3 of …
  6. Math(Please help)

    1)tan Q = -3/4 Find cosQ -3^2 + 4^2 = x^2 9+16 = sqrt 25 = 5 cos = ad/hy = -4/5 Am I correct?
  7. Calculus - please check my work

    differentiate each function a) y = cos^3x b) y = sin(x^3) c) y = sin^2 xcos3x my answers: a) y' = 3cos^2 x(-sinx) b) y' = cos(x^3)(3x^2) c) for this one, i don't know which one is correct. i got 2 different answers but i think they …
  8. Grammar Advisor

    I just cannot figure out if these answers are correct or not. Can you please help me?
  9. Calculus

    Q: If y=sinx/(1+tanx), find value of x not greater than pi, corresponding to maxima or minima value of y. I have proceeded thus- Equating dy/dx=0 we get{ (1+tanx)cosx-sinx.sec^2 x}/(1+tanx)^2=0……..(A) Or cosx+sinx=sinx.sec^2 x …
  10. Precalculus/Trig

    I can't seem to prove these trig identities and would really appreciate help: 1. cosx + 1/sin^3x = cscx/1 - cosx I changed the 1: cosx/sin^3x + sin^3x/sin^3x = cscx/1-cosx Simplified: cosx + sin^3x/sin^3x = cscx/1-cosx I don't know …

More Similar Questions