Find the maximum value of 2sin(x)-1.5cos(x)
Put the equation in the form Rsin(x-a) (=Rsin(x)cos(a)-Rcos(x)sin(a)). Looking at the original equation Rcos(a) = 2 and Rsin(a) = 1.5. Tan(a)=1.5/2 and R^2= 2^2 +1.5^2. Therefore R = 2.5 and a = 0.6435.The max value of 2.5 sin(x - 0.6435) = 2.5 and occurs when x = 2.2143 (4 d.p)
TA
Related Maths A Level answers
All answers ▸Find f(x^(1/2)+4)dx (Where f is the integral sign)
i) Using implicit differentiation find dy/dx for x^2 + y^2 = 4 ii) At what points is the tangent to the curve parallel to the y axis iii) Given the line y=x+c only intersects the circle once find c given that c is positive.
If y = 2(x^2+1)^3, what is dy/dx?
How do I use the chain rule for differentiation?