Let the cost of laying pipelines be $a/metre on land while $b/metre on sea.
total cost of laying pipelines =
use t-formula to rewrite the trigonometric expressions in quadratic form and minimise the quadratic equation.
Let the cost of laying pipelines be $a/metre on land while $b/metre on sea.
total cost of laying pipelines =
use t-formula to rewrite the trigonometric expressions in quadratic form and minimise the quadratic equation.