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If in a triangle ABC
COS A
cos B cos C

a b
2 – + + 2-
+
b
с
then t

By Eva

If in a triangle ABC
COS A
cos B cos C

a b
2 – + + 2-
+
b
с
then the value of the angle A is

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About the author
Eva


5. Divide the greatest number of 9 digits by the greatest number of 3 digits
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[(sin^2 theta÷2) – ( cos^2 theta÷ 2)] ÷ (sin theta÷2 cos theta÷2) = 1 – (1÷2 sin theta)​

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