Question

Find the derivative of sin(x+a)/cosx​

Answer 1

Answer:

$\frac{cos(x+ a)(1)cosx - sin(x + a)( - sinx)}{ {cos}^{2} x} \\ \\ \frac{sinx \: sin(x + a) + cosx \: cos(x + a)}{ {cos}^{2} x} \\ \\ \frac{sinx \: sin(x + a)}{ {cos}^{2}x } + \frac{cos(x + a)}{cosx}$