A ladder 20m long rest against a vertical wall so that the foot of the ladder is 9m long. Find correct to the nearest degree the angle that the ladder makes with the wall.

9 answers

sinB = 9/20 = 0.45.
B = 27o.

Nice and it remain the drawing

Let the unknown number be x
Sin = opp
adj
Sinx°=9/20
Sinx°=0.45
Divide both sides by sin
Sinx°=0.45
Sin Sin
x°=0.45
Sin
x=sin raise to power -1,0.45
x=26.7
x=27° to the nearest degree.

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I don't understand

Dollars

Let the unknown number be x
Tan x⁰= 9/20
Tan x⁰ =0•45
Divide both sides by tan
Tan x°/tan=0•45/tan
x°=tan raise to power-¹0•45
x=26•7
x=27°

To the nearest degree, the angle the ladder makes with the wall is 27°.

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