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Vanyuwa [196]
3 years ago
15

YOU WILL GET 20pts. PLEASE IT IS ABOUT TRIGONOMETRY. GIVE ME WORKING OUT AS WELL PLEASSSSSSSSSSSSSSE

Mathematics
1 answer:
mixer [17]3 years ago
6 0
Sin 20 is the answer
Using the trigonometry rule
Sin cos tan
Sin x = opposite side (a) / hypotenuse side (c)
A/c = sin x
x= 20 ( angle formed by side c and b )
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Answer:

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Step-by-step explanation:

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Since mDEF= 128, which is greater than 90 degrees there is no complement to it.

To figure out the supplement of DEF you have to subtract 128 from 180.

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