Differentiate y =cos^4(x)
Let u = cos xdu/dx = -sin xy = u4dy/du = 4u3dy/dx = dy/du * du/dx = (4u3 ) * (-sin x) = 4 cos 3 x * -sin x = -4 cos 3 x sin x
CK
Related Maths GCSE answers
All answers ▸ABC, DEF and PQRS are parallel lines. BEQ is a straight line. Angle ABE = 60° Angle QER = 80° Work out the size of the angle marked x. Give reasons for each stage of your working.
How do I solve a quadratic equation like x^2 - 2x - 35 = 0 without using a calculator?
Solve the two simultaneous equations. 1. x^2 + y^2 = 25, 2. y - 3x = 13
Solve x^2-5*x+6=0