Answer:
θ = 27.47°
Step-by-step explanation:
This problem can be represented as a right-angled triangle, as shown in the diagram below.
To find θ, we apply the tangent part of the trigonometric ratios SOHCAHTOA:
tanθ =
In the diagram, opposite = 1.3 m and adjacent = 2.5 m
Hence:
tanθ =
tanθ = 0.52
θ =
θ = 27.47°
The ramp forms 27.47° with the ground.
Answer: 7
Step-by-step explanation: This is an equalateral triangle. You can tell by the marks on each angle, marking that they are equal.
This means that the two sides that aren't the hypotenuse are the same.
Therefore,
Multiply out the 4
Subtract 8
Divide by 4
Answer:
(a) 0.198 cm/s (b) 1 cm/s
Step-by-step explanation:
It is given that,
The rate of change of area of a cicle,
(a) The area of a circle is given by :
Differentiate both sides,
(b) Circumference, = 5 cm
Hence,
(a) 0.198 cm/s (b) 1 cm/s