But there was no constant in the question? And wouldnt you only work with the left hand side-d/dθ(sinθ), to get to (pie / 180) * cosθ since you are kind of proving the left hand side? Sorry but I am kind of confused
But there was no constant in the question? And wouldnt you only work with the left hand side-d/dθ(sinθ), to get to (pie / 180) * cosθ since you are kind of proving the left hand side? Sorry but I am kind of confused
You want to manipulate the left side to get the right side
You are given theta in degrees and since $\displaystyle \frac{d}{dx} \sin(x) = \cos(x)
$ only holds in radians then you need to convert degrees to radians.
Ok that makes more sense, but by differentiating the LHS, it seems that chain rule wasn't used, and just the trig derivative, yet the question said prove using chain rule. Sorry again if I am asking a dumb question