Question

why must trig hate me..

The height of a cell phone tower, AB, is 250 feet.
What is the distance, in feet, between the tip of the tower A and a point C on the ground?

250 sin 48°

250 sec 48°

250/tan 48 degrees

250/cosec 48 degrees


do i use tan to solve or do i use sin?

Answer 1

they gave angle A

Answer 2

so we go to the corner A, and look at triangle.

Answer 3

then, the side AB looks adjacent.

Answer 4

and AC is obviously hypotenuse.

Answer 5

which ratio has, adjacent side, and hypotenuse ?

Answer 6

cos?

Answer 7

Perfect ! use it

Answer 8

so cos= 250/48*= 5.20833333333?

Answer 9

before putting it in calculator, look at the options given... they are not numbers

Answer 10

\(\cos 48 = \frac{250}{AC}\)

\(AC = \frac{250}{\cos 48}\)

\(= 250 \sec 48\)

Answer 11

B?

Answer 12

remember these, while doing these problems :

1/sin = cosec
1/cos = sec
1/tan = cot

Answer 13

thats right ! its B..

Answer 14

thanks :))

Answer 15

again :3

Answer 16

np :)