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LiRa [457]
3 years ago
5

If the sin 30=1/2 the cos 60=

Mathematics
1 answer:
PSYCHO15rus [73]3 years ago
8 0
Cos(60) = cos(90 - 30) = sin(30) = 1/2

This should be what you want.
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In right ∆ABC the altitude CH to the hypotenuse AB intersects angle bisector AL in point D. Find BC if AD = 8 cm and DH = 4 cm.
alina1380 [7]
Check the picture below.

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5 0
3 years ago
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Can anyone help me find the value pls?
Flauer [41]

The inside angle for B, which is labeled x is the same as the outside angle of D which is labeled as 72, so we know x = 72.

In a parallelogram two angles next to each other equal 180, so angle A and angle B equal 180.

We know B = 72, so A = 180-72 = 108

Angle A is divided in 2 by angle y, so y = 108/2 = 54

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4 0
3 years ago
Which is irrational?
sladkih [1.3K]

Answer:

  (b)  √5

Step-by-step explanation:

The square root of an integer is rational if the integer is a perfect square. You probably know the first few perfect square integers are 1, 4, 9, 16, 25, 36, ...

The integer 5 is not on that list, so its square root will be irrational.

  √5 is irrational

5 0
2 years ago
Pretty please help I’m timed
Alex

Answer:

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Step-by-step explanation:

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