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3 10. Without using a calculator, if sin-4 with A in the second quadrant and cosB with 4 B in the third quadrant, find

3 10. Without using a calculator, if sin-4 with A in the second quadrant and cosB with 4 B in the third quadrant, find a. cos(A+B) b. tan(A B) 11. Let sine a. b. c. 2 Mith 8 in QIII. Without using a calculator, find 15

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