Question

please.......
answer it i really get stuck... ​

Answer 1

• First differentiate both Y and X wrt t .

•Then find dy/dx and put the value of t =π/4.

Formula used :

$\star \boxed{ \red{ \bold{\frac{d}{dx} (u.v) = u \: \frac{dv}{dx} + v \: \frac{du}{dx} }}}$

$\star\boxed{ \bold{\frac{d}{dx} (sin \: x) = cosx}} \\ \\ \star \boxed{ \bold { \red{\frac{d}{dx} cosx = - sinx}}}$

Solution refer to the attachment