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RoseWind [281]
3 years ago
9

Help please!!!!!!!!!??????

Mathematics
2 answers:
photoshop1234 [79]3 years ago
8 0
The answer is 2 meters.

ahrayia [7]3 years ago
5 0
The answer is 2 meters long I hoped this helped :D
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Hello!  :))

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Naya [18.7K]

Answer:

see explanation

Step-by-step explanation:

Using the double angle identity for sine

sin2x = 2sinxcosx

Consider left side

cos20°cos40°cos80°

= \frac{1}{2sin20} (2sin20°cos20°)cos40°cos80°

= \frac{1}{4sin20} (2sin40°cos40°)cos80°

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