Question 83668
ladder 18ft long leans against vertical wall and makes angle of 72 degrees with level ground. how high up the wall does the ladder reach to nearest tenth of foot
:
We can use the sine for this, side opposite (x); is the height of the ladder:
:
Sin(72) = {{{x/18)}}}
.951 = {{{x/18)}}}
x = 18 * .951
:
x = 17.1 ft