Calculate the missing angle, given: angle B = 28 degrees angle C = 42 degrees
1 answer:
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For this case we must find an expression equivalent to:
We look for the factors of 10 and 30:
10: 1,2,5,10
30: 1,2,3,5,6,10,15,30
The greatest common factor of both numbers is 10.
Then, we can rewrite the expression as:
Answer:
From the identities above, you have
Applying once more, you have
So,