← Stop Writing Math.cos() in a Resize ListenerQuiz
Stop Writing Math.cos() in a Resize Listener
Test yourself on CSS's trigonometric functions — what they return, how they type-check inside calc(), and where JavaScript still has to do the math.
questions8
pass mark70%
resultsat the end
No account needed. Answer all 8 questions, then see your score with every answer explained and a reference to the spec or MDN — pass and you can claim a certificate.