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what is the exact value of cot (3pi/4) ?

Solve -2(4y + 6) = 52. 5 -5 8 -8 and !

Can someone check if i did this right since i really want to make sure it’s correct. if you do you so much

List x1, x2, x3, x4 where xi is the left endpoint of the four equal intervals used to estimate the area under the curve of f(x) between x = 4 and x = 6. a 4, 4.5, 5, 5.5 b 4.5, 5, 5.5, 6 c 4.25, 4.75, 5.25, 5.75 d 4, 4.2, 5.4, 6