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Some Applications Of Trigonometry

Question
CBSEENMA10008035

If sin left parenthesis straight A plus straight B plus straight C right parenthesis equals space 1 comma space space tan space left parenthesis straight A minus straight B right parenthesis space equals space fraction numerator 1 over denominator square root of 3 end fraction space and space sec left parenthesis straight A plus straight C right parenthesis space equals 2 comma find A, B and C when they are acute.

Solution

Solution not provided.
Ans.   angle straight A equals 60 degree semicolon space angle straight B space equals space 30 degree semicolon space angle straight C space equals space 0.

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