Answer:
sin^2 x
Step-by-step explanation:
By the formula,
sin^2 x + cos^2x = 1
so, 1 - cos^ 2 x = sin ^2
<h2>HOPE IT HELPS U!!!! </h2>
Answer: 325
Explanation:
Let the number of adult tickets be <em>x </em>
( since there are an unknown amount of tickets for adults, we already know how many student tickets there are)
Let the number of student tickets be <em>x+</em>60
710=<em>x+x</em>+60
710=2x+60
-60 -60
650=2x
650/2
= 325
Adult tickets=325
Student tickets=385
Answer: I got you.....the correct answer will be (-2,-3) aka D
Step-by-step explanation:
Question:
A boy makes a cone of diameter 28 cm without a base. He then cuts a smaller cone of diameter 20 cm from the cone. He used the bottom part as a lampshade. If the height of the lampshade is 11cm,
(a) find the volume of the whole cone.
(b) find in cm2, the area of the material used to make the lampshade.
Answer:
(a) V ≈ 16420.1
(b) A ≈ 2690.1 cm²
Step-by-step explanation:
<u>Solution for (a)</u>
Formula: The formula for the volume of a cone is V = 1/3 hπr².
V= πr² h
/3 = π × 28/ 2 × 20/ 3 ≈ 16420.0576
16420.0576 in nearest tenths is 16420.1
Therefore, the volume of the whole cone is 16420.1 cm²
<u>Solution for (b)</u>
Formula: A = πrl + πr2.
l = r² + h²
Solving for A
A = πr (r + h²+ r²) = π × 20 × (20 + 112 + 202) ≈ 2690.80077
2690.80077 In nearest tenths, is 2690.1
Therefore, the area of the material used to make the lampshade is 2690.1 cm²
