How do I differentiate a trigonometric function for something that is not just a single variable (e.g. d/dx (sin(3x))?
In order to differentiate a trig function with a term in front of the variable you are differentiating, you must use the chain rule. For example d/dx (sin (3x)) becomes 3cos(3x) because you have to multiply the two differentials: 3 and cos (3x).
KT
Related Maths A Level answers
All answers ▸Find the gradient of the line with equation 2x + 5y = 7
Differentiate the equation y = x^2 + 3x + 1 with respect to x.
Problem of Optimisation: A company is designing a logo. The logo is a circle of radius 4 inches with an inscribed rectangle. The rectangle must be as large as possible.
Use integration by parts to find the integral of ln x by taking ln x as the multiple of 1 and ln x