What are you stuck on?
Snap it or type it. You get the steps, why they work, and it sticks around for the exam.
See an example solve
This is what you getExample
find dy/dx for y = sin(3x²)
Answer
dy/dx = 6x·cos(3x²)
Step 1 — Spot the composition
y = sin(u) with u = 3x² — an outer function wrapped around an inner one, so the chain rule applies.
Step 2 — Differentiate the outer function
d/du [sin(u)] = cos(u), so we get cos(3x²), keeping the inside untouched.
Step 3 — Multiply by the inner derivative
du/dx = 6x, so dy/dx = cos(3x²) · 6x = 6x·cos(3x²).
Why this works
The chain rule composes rates of change: how fast sin changes with respect to u, times how fast u changes with respect to x.
Every solve comes with the steps, the why, and practice problems — and it stays in your review queue on this device, so it's still there at the exam.
Snap it or type it
Any subject — math, chemistry, an essay prompt, a passage to analyze.
A PDF works too — a problem set, a syllabus, lecture slides. We read one page at a time.
or type it
Already tried it? Send a photo of your own working and we'll find the first line that breaks, instead of the answer. Uses one solve.