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If " sin " theta =(3)/(5) " and cos ...

`If " sin " theta =(3)/(5) " and cos " phi =(-12)/(13) " where " theta " and " phi` both lie in the second quadrant find the values of
`(i) " sin ' (theta- phi) " " (ii) " cos " (theta + phi) " " (iii) " tan " (theta - phi)`

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