Principle Of Mathematical Induction


If sin space straight A space equals space 4 over 5 space space and space cosB space equals space fraction numerator negative 5 over denominator 13 end fraction comma where 0 less than straight A less than straight pi over 2 comma space straight pi over 2 less than straight B less than straight pi comma find the value of cos(A - B).


Solution not provided.
Ans. 33 over 65

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