Refer to the figure, in which a unit circle is drawn. The line segment DR is tangent
Question:
Refer to the figure, in which a unit circle is drawn. The line segment DR is tangent to the circle and 0 is acute
(a) Express the area of ΔOBC in terms of sin θ and cos θ.
(b) Express the area of ΔOBD in terms of sin θ and cos θ.
(c) The area of the sector O͡B͡C͡ of the circle is 1/2 θ where θ is measured in radians. Use the results of parts (a) and (b) and the fact that
to show that
Area AOBC < Area ÓBC < Area AOBD sin 0 cos 0
Step by Step Answer:
a b c ...View the full answer
Related Video
The area of a circle is given by the formula: A = ?r^2 Where A is the area, ? is a mathematical constant (approximately 3.14), and r is the radius of the circle. The radius is the distance from the center of the circle to the edge. So for example, if the radius of a circle is 5 units, the area would be: A = ?(5^2) = ?(25) = 78.5 square units Here three friends went out to a restaurant and decided to have pizza for lunch. While they were waiting for their order, one of them stepped out to take a call but promised to return in two minutes. The waiter came and presented them with the menu, and they decided to order two 10-inch pepperoni pizzas. The waiter took their order and left. Just then, the third friend returned and asked what they had ordered. They explained that they had ordered two small pepperoni pizzas as they were only three of them and it would be enough for them. However, the third friend suggested that for the same price, they could get a large pizza that would be much bigger than the two small ones. He asked the waiter for a pen and paper and proceeded to calculate the area of the two small pizzas and compared it to the area of one large pizza. The friends were amazed at how the circle measurements worked and decided to change their order from two small pizzas to one large pizza.
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