Posted by **sonia** on Friday, May 9, 2008 at 12:54am.

The equation of the tangent line to y=f(x) at a=2 can be written in the form y=mx+b where f(x) =4sinx/4sinx+6cosx

i already got 3/2 for m but i cant seem to find out how to get the value of b?

- calc -
**drwls**, Friday, May 9, 2008 at 9:04am
Does f(x) = 4 sinx/(4sinx+6cosx) ?

If so, you need parentheses in the denominator.

You say you want the tangent point to be at a=2. Do you mean x=2? Or x = 2 pi? I don't see how you can get 3/2 for the slope if the equation involves the sin and cos of 2.

If you have the correct slope m, then you can get b by requiring that the value of y = mx + b be the same at the value of f(x) at at the point of contact.

## Answer this Question

## Related Questions

- calculus please help me - Let f(x)=9sinx/2sinx+4cosx. Then 'f(x)= ((2sinx+4cosx...
- math - Use implicit differentiation to find the equation of the tangent line to ...
- Calculus exam review, PLEASE HELP!! - for each function, determine the equation ...
- Calculus - If f(x)=4sinx/1+cosx then f'(x)=_____? I think that the derivative of...
- Calc - The slope of the tangent line to the parabola y=4x2–3x+5 at the point ...
- math calc - The equation of the tangent line to f(x) =sqrt{x} at x = 25 can be ...
- Calculus - For how many values of x will the tangent lines to y=4sinx and y=x^2/...
- Calculus - For how many values of x will the tangent lines to y=4sinx and y=x^2/...
- calc - The slope of the tangent line to the parabola y=4x2–3x+5 at the point ...
- Calculus - f(x)=4sinx/1+cosx find f'(x) this is what i got and i dunno what i ...

More Related Questions