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Is this a vertical ladder? Another contributor's answer:Providing that the slide is on level ground and that the ladder is vertical then you have the outline of a right angle triangle with an hypotenuse (the slide) of 3 metres and an adjacent angle of 40 degrees. To find the height of the opposite (the ladder) side of the triangle use the trigonometrical sine ratio: sine = opposite/hypotenuse When the ratio is rearranged: opposite = hypotenuse*sine opposite = 3*sine 40 degrees = 1.928362829 metres So the height of the ladder needs to be nearly 2 metres high.
Low friction is slippery high friction has good traction. In the sport of Curling (gliding those heavy granite stones on ice towards a bullseye) one shoe has low friction (to slide on the ice) the other has high friction (to propel the player).
If I give you a 600mL of medicine for 2 adults and 1 child. The child takes 37% of the adult dosage. What are the doses? .....yes, you need algebra. If I got a beaker that is 12 mm high and the mouth opening is 2mm wide, and I ask you to give me a 41.4 cubic mm of a solution, ......yes, you will need trigonometry.