Question: 3. If cosu = - - and sin v = - 24 75 and both u and v are in Quadrant IV, find a. sinu

3. If cosu = - - and sin v = - 24 75 and both u and v are in Quadrant IV, find a. sinu b. cosv c. sin(u - v) d. cos(u + v) e. sing f. cos Zu 4. Find the exact value of cos 15 using each of the following. a. Half-angle formula b. Difference formula

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