## anonymous one year ago find the height of a flag pole if the angle of elevation of its top changes from 30 to 45 degrees as the observer advances 10 ft. towards the base

Let height be h Then distance from pole=h/tan30 =h√3. (Tan30=1/√3) Again Angle is 45 Than distance =h/tan45 =h. (Tan45=1) Now According to question h√3-h=10. Solve for h now.

Make diagram for more illustration Remember tanx=perpendicular/base So. Length of base=perpendicular/tanx

3. anonymous

why did you use $\sqrt{3}$ ?

4. anonymous

tan30. is what ?

6. anonymous

$\sqrt{3}/3$

We can write it 1/√3

8. anonymous

oh i see thank you :)