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Liula [17]
3 years ago
10

Find a. Roud to the nearest tenth: 2cm 15* a 105* c

Mathematics
1 answer:
MariettaO [177]3 years ago
6 0

Answer:

So since we use law of sines. We can get 2 fractions equal to eachother but first we need to solve for missing angle. That would be 180-105-15 = 60

So now we can get a fraction. So that means that sin(105)/2 = sin(60)/a

Then we do recipricol. 2/sin(105) = a/sin(60)

multiply by sin(60) both sides.

2sin(60)/sin(105) = a

round and solve and we get a is equal to

1.7931 or 1.8

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