Answers created by Joe North
 Back to user's profile

Is 0.45 a rational number?

How can I prove the identity for cos(x+pi)=cos x ?

How do you find the derivative of #f(x)= 2/x#?

What is the equation of the line tangent to # f(x)=(x^21)/(x^2+4) # at # x=3 #?

What are the absolute extrema of #f(x)=9x^(1/3)3x in[0,5]#?

Is #f(x)=e^x/cosxe^x/sinx# increasing or decreasing at #x=pi/6#?

How do you use Integration by Substitution to find #intx^2*sqrt(x^3+1)dx#?

If the arean of circle is 56 what is radius??

If sin theta=2/3 with theta in quadrant 1, find sec theta?

How do you differentiate #g(t)=1/(t^4+1)^3#?