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Mathematics, 21.06.2019 18:30
Express the following as a function of a single angle. cos(60) cos(-20) - sin(60) sin(-20)
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Mathematics, 21.06.2019 18:50
Expresa commuter train leaves downtown sation and travels at a average speed of 55 miles per hour towards the north side sation, which is 50miles away. thirty minutes later, express commuter train #7 leaves north side and travels at a average speed of 35miles per hour towards downtown sation. at the moment the two trains pass each other, how far(in miles) is train #12 from the downtown sation and how long(in minutes) has the #12 train been traveling
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