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Mathematics, 24.04.2020 03:00 giovney

The terminal side of angle a lies in Quadrant III and the terminal side of angle b lies in Quadrant IV. If tan a = 4/9 and cot β = −2/7 , find the EXACT value of

sin ( a−b )

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The terminal side of angle a lies in Quadrant III and the terminal side of angle b lies in Quadrant...
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