-120° = -2π/3 radians.
Tangent is defined as Opposite/Adjacent or Sine/Cosine in a unit circle. So, if you have memorized the unit circle,
sin(-2π/3) = √3/2
cos(-2π/3) = -1/2
So, tan(-2π/3) would be:
Simplify, and you get:
And, so, tan(-2π/3) = -√3
Answer:
4.9m
Step-by-step explanation:
In circle Y:
Radius=4m
Central Angle of XYZ=70°
Length of an arc
Therefore, Length of minor arc XZ
=4.9m (correct to the nearest tenth)
The answer is 7. if you go ahead and add 6+5 you will get 11 and if you take away 4 you are left with 7. hope this helps. :)
The point of observation is 2500 m away from the foot of the building.
The angle of elevation is 4°.
We need to find the height 'h' of the building.
With respect to 4°,
2500 is the adjacent side.
'h' is the opposite side.
The trigonometric ratio associating opposite & adjacent is tan.
We have
Cross multiplying we get
h = 2500 tan4°
h= 174.82 m
Option B) is the right answer.
Answer:
x=75
Step-by-step explanation:
74 = x-1
+1 +1
75=x