C4 further calculus parametric differentiation help needed!

about to upload my question now... think what i've done up to is correct just dont know where to go from where i am...

Question 15

If your second bracket is supposed to be dt/dx it's incorrect, you can't just flip the two fractions like that and get the correct result.

how should it be written?

how should it be written?

Question 15

^^take note of asurats post

take this example; $\displaystyle x = 3 + 2$ but $\displaystyle \frac{1}{x} \neq \frac{1}{3} + \frac{1}{2}$, notice how you cant just flip both fractions like that


so score out the last line and get dx/dt and dy/dt both as a single fraction with a common denominator. btw your writing is really nice

PS aren't you a fan of the quotient rule?

is this correct?

looks good to me nice job

is this correct?