Ehsan

A man can still swim in water at speed 3km/h. He want to cross a river that flows at 2km/h and reach directly opposite to the starting point 1) find in which direction should he try to swim and find the angle of his body makes river fkowst 2) how much tim...

tan = sin(x)/cos(x) cot = cos(x)/sin(x) sec = 1/cos(x) (sin(x))^2 + (cos(x))^2 = 1 tan(x)/cot(x) - sec(x)/cos(x) = (sin(x))^2/(cos(x))^2 - 1/(cos(x))^2 = ((sin(x))^2-1)/(cos(x))^2 = (cos(x))^2/(cos(x)^2) = 1 tan(x).sin(x) + cos(x) = (sin(x))^2/cos(x) + co...

Yeah he can bec 1foot = 12inches so the piece of wood has 3*12 36 inch long so the first piece = 12+5=17 inch the second piece = 7 inch so the last piece = 36-(7+17)=12 inch so do the inequality of triangle (the sum of two sides must be greater than the r...

600

How do you get the answer