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satela [25.4K]
3 years ago
12

Which of the following is not equal to cos⁡(520°)?

Mathematics
2 answers:
Gnoma [55]3 years ago
8 0
The cosine repeats itself every 360 degrees, and it mirrors at 0 and 180 degrees. It inverts around 90 and 270.
So without using a calculator, you can tell that:

cos(520)=cos(520-360)=cos(160)
cos(160) = cos(180-20) = cos(180+20) = cos(200)
cos(160) is NOT equal to cos(20), it would be -cos(20).
cos(160) = -cos(20) = -cos(-20)

So C is the only one unequal.
Bas_tet [7]3 years ago
8 0

Answer:

c is not equal to cos(520)

Step-by-step explanation:

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netineya [11]

Answer:

x= 30 degrees

Step-by-step explanation:

This is an isosceles triangle as indicates by the lines on the sides.

Since the sides lengths are equal, the base angles are  equal

x= 30 degrees

6 0
4 years ago
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Georgia [21]

Answer:

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Step-by-step explanation:

4 0
3 years ago
Can someone help me out?
LiRa [457]

1. perimeter = 4 and area = 1

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3. perimeter = 12 and area = 9

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7 0
4 years ago
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7m+12 over 8= 2m-1 over 3​
Sonja [21]

Answer:

m=-44/5

Step-by-step explanation:

(7m+12)/8=(2m-1)/3

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8(2m-1)=3(7m+12)

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4 0
4 years ago
42 divided by (15-2 to the 3rd power) someone smart and fast help me! Please
Serhud [2]

Answer:

6

Step-by-step explanation:

Step 1: Multiplying  the power

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Step 2: Subtracting:

15-8 = 7

Step 3: Dividing

42/7 = 6

Answer : 6

Hope this HELPED

BRAINLIEST IS MUCH APRECIATED

3 0
3 years ago
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