I am running into trouble with this question:
I get as far as
$$1 = \cos y\frac{dy}{dx} - \sin y\frac{dy}{dx}$$
$$1 = \frac{dy}{dx} (\cos y - \sin y)$$
$$\frac{dy}{dx} = \frac{1}{\cos y-\sin y}$$
Second derivative:
Unsure how to continue here
I am running into trouble with this question:
I get as far as
$$1 = \cos y\frac{dy}{dx} - \sin y\frac{dy}{dx}$$
$$1 = \frac{dy}{dx} (\cos y - \sin y)$$
$$\frac{dy}{dx} = \frac{1}{\cos y-\sin y}$$
Second derivative:
Unsure how to continue here