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Mathematics, 19.04.2021 16:30 ndurairajownkpq

Angle \alpha lies in quadrant II, and tan\alpha =-(12)/(5). Angle \beta lies in quadrant IV, and cos\beta =(3)/(5). What is the exact value of sin(\alpha +\beta )?

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Angle \alpha lies in quadrant II, and tan\alpha =-(12)/(5). Angle \beta lies in quadrant IV, and cos...
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