Question

Check my answer? (Trigonometry)

Answer 1

sin was correct ...

Answer 2

sin 70 = 140 / x
2.7474 = 140 / x
x = 51 ft.

Answer 3

x = 140/sin(70) ....

Answer 4

correct

Answer 5

@amistre64 @duality Thank you

Answer 6

make sure your mode is on degrees, or convert them

Answer 7

sin(70deg) not= sin(70rads)

Answer 8

and, since sin is a value from -1 to 1, it cant rightly be 2 point something

Answer 9

@amistre64 It is, thanks

Answer 10

: ))

Answer 11

lol, mine was in radian mode

Answer 12

the distance from the boat to the top of the lighthouse cant be less than the height of the lighthouse .... so 51 seems a little off to me

Answer 13

51 is about the distance the boat is from the base of the lighthouse

Answer 14

yes @amistre64 is right, so sorry i just look at the approach, sin values are between -1 and one therfore 2.74 is on a different scale sorry @jcari

Answer 15

@duality @amistre64 lol that's okay, I got it now : )
I have one more to show

Answer 16

It says from point A, he walked downstream 60 feet to point B, so in place of x, wouldn't that be 60 ft?

I did cos 44 = 60 / x
.7193 = 60 / x
x = 83.41

Do you know what I did wrong?

Answer 17

the lengths involved are side and side ... tangent plays with sides

Answer 18

tan = w/x

Answer 19

therefore w = 60 tan(44)

Answer 20

Oh I just realized I did cos instead of tan! Okay, I worked it out and got 57.936 which rounds to 58 and that's one of the answers :D

Answer 21

yep, also

44 is almost 45; at 45 it would have been 60, so a little less then 60 is 58

Answer 22

Thank you! @amistre64

Answer 23

youre welcome