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lorasvet [3.4K]
3 years ago
10

Verify the identity sin^2(x/2)=(1-cosx)/2

Mathematics
1 answer:
horsena [70]3 years ago
5 0
Use the following identity:

cos(2x)=1-2sin^2(x)
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Find the area of these shapes AND explain your method <br> Can some one help me :((
-Dominant- [34]

Answer:

Triangle - 21 units

Trapezoid - 65 units

Step-by-step explanation:

  • Because this triangle and trapezoid are reflections of each other when split in half, remove the highlighted parts to make them a rectangle. When made into a rectangle, you can use the formula length * width to find the area of either shape (trapezoid or triangle).
  • Note you won't be able to do this when solving for the area of ALL trapezoids and triangles.

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3 years ago
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13<br><br>__ W=130 what is W<br><br>10 15 Points if you answer
11111nata11111 [884]

W=130

Step-by-step explanation:

the question giving says_W=130and if minus is crossing to the other side it becomes+

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2 years ago
Simone paid $12 for an initial years subscription to a magizine. The renewal rate is $8 per year. This situation can be represen
Y_Kistochka [10]
This is easy. Select different values for x to find y values.

For example, let x = 0.

y = 8x + 12

y = 8(0) + 12

y = 0 + 12

y = 12

On your table, you have x = 0 and y = 12.

Do the same using other values of x.
5 0
3 years ago
The cost of a hotel room during Nigel's trip is $180. The hotel room tax in the city he is in is 11.5%. What is the total cost o
kumpel [21]

Answer:

Step by Step:

multiply the cost by the percentage.

Then add the cost to the answer

Answer:200.70

6 0
3 years ago
Andreas wants to estimate how many fish there are in a lake. One day he catches 20 fish,marks them,and returns them to the lake.
tensa zangetsu [6.8K]

Answer:

50

Step-by-step explanation:

The ratio of marked fish to caught fish is 4:10, we need to solve for x in 20:x, since 4 * 5 = 20, 10 * 5 = x so x = 50 fish.

8 0
3 years ago
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