Câu1: Cho cos2x=3/5 với 3pi/4. Tính sinx, cosx, tan(x-pi/4). Câu2: Tìm giá trị lớn nhất, nhỏ nhất của biểu thức P= -2sin(x+pi/3)+2

(a) calculate the molarity of a solution that contains 0.0345 mol nh4cl in 400 ml of solution. (b) how many moles of hno3 are present in 35.0 ml of a 2.20 m solution of nitric acid? (c) how many milliliters of 1.50 m koh solution are needed to supply 0.125 mil of koh ?

If the measure of angle 1 is 110 degrees and the measure of angle 3 is (2 x+10 degree), what is the value of x?

Amovie streaming service charges it’s customers $15 a month. martina has $98 saved up. will she have any money left over if she pays for the maximum amount of months she can afford? explain.