a. A 30m ladder leans against a wall of a building. If the foot of the ladder is 10m from the building. What is the angler the ladder makes with thr ground?
Let me explain the picture:
It's an acute triangle.
30m hypotenuse
10m adjacent side
opposite side ?
and 0 with a - on it is inside the triangle. And it's ?
I hope this helps, anywho. With that, what do I use? The Pythagorean Theorem or COS, or SIN.
Please, help me.
2007-05-17 02:08:16 · 6 answers · asked by Cassandra S. 6 in Science & Mathematics ➔ Mathematics
Use the cosine. Cosx=adjacent/hypotenuse
So, Cosx = 10/30 = .3333
So, x = 70.5 degrees
2007-05-17 02:13:08 · answer #1 · answered by Anonymous · 1⤊ 0⤋
Use the cosx = 10/ 30. then use cos^-1(1/3) this will give you the angle in degrees. Make sure your calculator is in the degree mode not radian mode.
2007-05-17 13:05:26 · answer #2 · answered by dave c 1 · 0⤊ 0⤋
Use the cos of an angle.
cos x = 10/30
cos x = 1/3
x = 70.5 deg
.
2007-05-17 09:16:43 · answer #3 · answered by Robert L 7 · 0⤊ 0⤋
sec0=30/10
=> sec0=3 or cos0=1/3
prpendicular=800m2=20 root2
2007-05-17 09:17:26 · answer #4 · answered by kaur890 2 · 0⤊ 0⤋
Just do like this....
|\
| \
| \
| \ 30m
| \
| \
| \
|_____(x \
10m
so.....
Cos (x) = 10/30
Cos (x) = 0.33333333333333
Cos (x) = 0.33
(x) = Cos^(-1) [0.33]
Jst checkout the answer o Cos^(-1)[0.33] from logarithem book. then u'll get the value o (x)
2007-05-17 09:22:57 · answer #5 · answered by Isuru 1 · 0⤊ 0⤋
cos x=10/30
x=cos inverse(0.3333)
2007-05-17 09:12:52 · answer #6 · answered by Tommy 2 · 1⤊ 0⤋