Understanding R formula

Quite a number of students have difficulty understanding R formula.

Hopefully this graph will help.

R forumula3 sin(x)+4 cos (x) expressed in R formula is 5 sin(x+0.927)

So the two graphs appear as 1 graph.

Max value of 3 sin(x)+4 cos (x) = 5. Occurs when sin(x+0.927)=1

Min value of 3 sin(x)+4 cos (x) = -5. Occurs when sin(x+0.927)=-1

Students can try their hands in R formula at https://www.desmos.com/calculator

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