Calculus
posted by Linda .
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)/2ã(x)
2). Differentiate 2t/(4+t^2) = (82t^2)/(4+t^2)^2
3). Differentiate (1secx)/(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.
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