Search over 10,000 free study notes

sin(2x)=sin(x+x) =sin(x)cos(x)+cos(x)sin(x) =2*sin(x)*cos(x); cos(2x)=cos(x+x) =cos(x)cos(x)-sin(x)sin(x) =[cos(x)]²-[sin(x)]² Now let x+y=a and x-y=b, then x=(a+b)/2 and y=(a-b)/2. ...

This is an example of a simultaneous equation - 2X + Y = 5X + 3Y = 10 You can think of X and Y as apples and oranges from a market. You know that if you buy 2 apples and 1 orange it cost £5, but this does...

El año pasado, fui a Grecia con mis padres y mi mejor amigo que se llama Jack. ¡Lo pasé bomba! He estado yendo a Grecia desde que tenía ocho años. Todos los días fuimos a la playa y nadamos en el mar. Ade...

There are two ways to make the future tense in French:The first is generally used to describe things that will happen in the near future. The French near future uses the verb “aller” (to go) in the presen...

An offer may be defined as a statement showing a desire to contract on certain terms and to be legally bound by those terms. On the other hand, an invitation to treat is only inviting the party to make an...