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anonymous
 one year ago
A television antenna 20 m high stands top of a house which 12 m high. At what distance from the base of the house will the antenna and the house subtend equal angle?
A. 24 m* B. 15 m C. 31 D. 28 m
the answer should be 24
anonymous
 one year ago
A television antenna 20 m high stands top of a house which 12 m high. At what distance from the base of the house will the antenna and the house subtend equal angle? A. 24 m* B. 15 m C. 31 D. 28 m the answer should be 24

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welshfella
 one year ago
Best ResponseYou've already chosen the best response.1dw:1443354484410:dw

welshfella
 one year ago
Best ResponseYou've already chosen the best response.1so you need to find D when x = y right?

radar
 one year ago
Best ResponseYou've already chosen the best response.3I'm here, but it is not my problem @welshfella, was hoping you would provide some more steps (for my own edification lol).

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0i have tried to solve it but i cant get 24m

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0we have the same drawing but still i cant get the answer

welshfella
 one year ago
Best ResponseYou've already chosen the best response.1lol ok well i think we can use the double angle formula. write y for x: so tan 2y = 2 tan y  1  tan^2 y and tan y 2y = 32/D and tan y = 12 / D

welshfella
 one year ago
Best ResponseYou've already chosen the best response.1* that's tan 2y = 32 / D

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0what should i do next?

welshfella
 one year ago
Best ResponseYou've already chosen the best response.1plug tan 2y = 32/D and tan y = 12/D into the above identity and solve for D

IrishBoy123
 one year ago
Best ResponseYou've already chosen the best response.0@welshfella big fat Celtic Congrats, mate!!!

welshfella
 one year ago
Best ResponseYou've already chosen the best response.1dw:1443355391490:dw

welshfella
 one year ago
Best ResponseYou've already chosen the best response.1HaHa Thanks Irish boy. We beat the English!!!!

welshfella
 one year ago
Best ResponseYou've already chosen the best response.1@Jluz  can you solve that one for D?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0i used my calcu shift solve but it doesnt result in to 24m

radar
 one year ago
Best ResponseYou've already chosen the best response.3Yes is does, thanks @welshfella

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0@radar i cant get it my answer is 12.38

welshfella
 one year ago
Best ResponseYou've already chosen the best response.1yea I get the same as you JLuz Maybe i made a mistake somewhere....

radar
 one year ago
Best ResponseYou've already chosen the best response.3dw:1443355873893:dw Do you follow this far @JLuz

radar
 one year ago
Best ResponseYou've already chosen the best response.3dw:1443355996631:dw How about to this?

welshfella
 one year ago
Best ResponseYou've already chosen the best response.1yea it does work out to 24

radar
 one year ago
Best ResponseYou've already chosen the best response.3dw:1443356181782:dw and then to this?

welshfella
 one year ago
Best ResponseYou've already chosen the best response.1gotta go ul leave you in capable hands of radar

radar
 one year ago
Best ResponseYou've already chosen the best response.3Can you take it to "24" ?

radar
 one year ago
Best ResponseYou've already chosen the best response.3Good As you see, I just used "cross multiplication" of the fraction.

radar
 one year ago
Best ResponseYou've already chosen the best response.3Good luck with your studies.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0why does she uses double angle formula??

radar
 one year ago
Best ResponseYou've already chosen the best response.3Go ahead, but I think @welshfella has left, he had the incite for the solution.

radar
 one year ago
Best ResponseYou've already chosen the best response.3Because the angle to the top of the antenna is equal to the sum of the two equal angles to the top of the house and the angle from the top of the house to the top of the antenna. In the drawing the big angle is equal to the sum of X and Y and we are told that they are equal .......... hence "double angle"

radar
 one year ago
Best ResponseYou've already chosen the best response.3I was messing around trying to use the law of sines and wasn't getting anywhere, I think that double angle approach was a good idea.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0i was trying to analyze your explanation haha

radar
 one year ago
Best ResponseYou've already chosen the best response.3The use of the double angle identity was a wise choice. You will run into that identity in Trig' maybe you already have studied the trigometric identities.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0ok radar thank you for your big help

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0it is a big help in my studies

radar
 one year ago
Best ResponseYou've already chosen the best response.3I think you will do well, because you knew what the answer was, but you needed to know "how" or verify that it was indeed a correct answer, that is a good trait.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0as well as to @welshfella
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