Cho sinx + cosx= 1/2 và x lớn hơn hoặc bằng pi trên 4 , nhỏ hơn hoặc bằng pi trên 2 . Tính sin2x và cos2x

What is the value of x in the this question ?

Acollection of coins has value of 64 cents. there are two more nickels than dimes and three times as many pennies as dimes in this collection. how many of each kind of coin are in the collection?

Type the correct answer in the box. consider the system of linear equations below. rewrite one of the two equations above in the form ax + by = c, where a, b, and c are constants, so that the sum of the new equation and the unchanged equation from the original system results in an equation in one variable.