The bottom of the ladder on a horizontal flat surface rests against a wall. It makes an angle of elevation of 39°. The bottom of the ladder is 48 ft from the base of the wall. Approximately how long is the ladder?

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10-08-2017
Mathematics

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The bottom of the ladder on a horizontal flat surface rests against a wall. It makes an angle of elevation of 39°. The bottom of the ladder is 48 ft from the base of the wall. Approximately how long is the ladder?

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At the begining of 6 grade the ratio of number of the advanced math students to the number of regular students was 3:8. However after taking the placement tests

if arctan(3/5)=K Tan(k)=?

At the begining of 6 grade the ratio of number of the advanced math students to the number of regular students was 3:8. However after taking the placement tests

irspow irspow · Answer 1 · 2017-08-10T22:37:25+02:00

irspow irspow

10-08-2017

cosα=x/L

L=x/cosα, we are told that the ladder base is 48 ft from the base of the wall and α=39° so:

L=48/cos39 ft

L≈61.76 ft (to nearest hundredth of a foot)

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