natclrk187
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precal dc:

Let sin A = 1/3 where A terminates in Quadrant 1, and let cos B = 2/3, where B terminates in Quadrant 4. Using the identity:
cos(A-B)=cosACosB+sinAsinB

find cos(A-B)

precal dc Let sin A 13 where A terminates in Quadrant 1 and let cos B 23 where B terminates in Quadrant 4 Using the identity cosABcosACosBsinAsinB find cosAB class=

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