Krishna
0

Step 1:  Understand the given information and make an imaginary figure.

              GIVEN:  Assume a palm tree

                            Distance between the palm tree and observer = 13.2 m

                            Height of the observer  = 1.8 m

                  Angle of elevation of the top of the tree from his eyes = 45\degree

            FIGURE:

                            

                              From the figure we can write

                                          AC = BE = 13.2 m

                                          AB = EC = 1.8 m


Step 2: Search for the suitable trigonometric ratio

            NOTE:   \triangle BDE is right angle triangle

                        We know the adjacent side we have to calculate the opposite side


                        So, use the \tan \theta = \frac{opposite}{adjacent}


          EXAMPLE: \tan \theta = \frac{opposite}{adjacent} =\frac{DE}{BE}


                               \tan 45\degree = \frac{DE}{13.2} (BE = AC)


                                          DE  = 13.2 m

                      Total length of the palm tree = EC + DE

                                                                    = 1.8 + 13.2 (since, AB = EC)          

                                                                    = 15 m

  

                              

                              

                                



Pendyala Varsha
0
Thank u somuch krishna sir
Pendyala Varsha
0
But sir there is one mistake AC=BE=13.2 But not 13.5
Pendyala Varsha
0
I am really sorry to point out I didn't mean to insullt sorry
Mahesh Godavarti
0
Thanks for pointing out the typo. It's been fixed.
Pendyala Varsha
0
Mahesh sir IAM sry I didn't get that Could u pls repeat it again Sorry
Mahesh Godavarti
0
Thanks for pointing out that it should be 13.2 and not 13.5. We fixed the mistake.