Step-by-step explanation:
let T be the top of the ladder
let F be the foot of the ladder
let B be the base of the wall
you need to find the distance between the foot of the ladder and the base of the wall, in other words the distance of the 'ground' ( refer to the diagram).
you are given that the hypotenuse - H is 3 m and that the opposite - O ( wall ) is 2.8 m.
i) find the angle
given
H, O → use SOH, sin.
sin x = opp. /hyp.
sin x = 2.8 / 3
x = sin-1 ( 2.8/ 3)
x = 68.960...
x = 70.0 ° ( 3 s.f)
ii) use either tan or cos to find the adjacent (wall)
using TOA, tan:
tan ( 68.96) = 2.8/ adj.
2.8 / adj. = tan (68.96)
adj. × tan (68.96) = 2.8
adj = 2.8/ tan (68.96)
adj = 1.0770...
adj. = 1.08 ( 3 sf)
base = 1.08 m
or you could rather simply work this out using Pythagoras Theorem:
where hyp. is c², the base is b² and height is a²;
c² = a² + b²
b² = c² - a²
b² = (3)² - (2.8)²
b² = 1.16
b = √1.16
b = 1.0770
b = 1. 08 m ( 3sf)
you can give your answer to 3 sf or 2 sf.
hope this helps you!
-s.
Answer:
mathematics*
Step-by-step explanation:
The rate of change per x value is 2.
We know this because the slope is 2, and the slope dictates the amount of change.
The line is written in slope intercept form, which is y = mx + b
Answer:
-7. negative
Step-by-step explanation:
49 + -56
49 - 56
-7
Answer:
B
the measure of angle A: 18.6°
measure of angle B: 55.8°
measure of angle C: 105.6°
Step-by-step explanation:
6x - 6 + 3x + x = 180
10x - 6 = 180
10x (- 6 + 6) = 180 + 6
10x = 186
10x/10 = 186/10
x = 18.6
18.6 + 3(18.6) + [6(18.6) - 6] = 180
18.6 + 55.8 + 105.6 = 180
180 = 180