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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. ...

The arrival of a nerve impulse at a synapse causes Ca2+ channels to open (1 mark). Ca2+ ions enter the presynaptic knob by facilitated diffusion (1 mark). The presence of Ca2+ ions causes synaptic vesicle...

This is the weakest intermolecular force. It is formed by the uneven distribution of electrons in a molecule which induces a dipole in the molecule (meaning a delta positive and delta negative charge form...

Keeping all other factors fixed, increased competition will make the demand curve that firms face flatter due to increased elasticity of the demand. By drawing a diagram depicting a firm's costs and reven...

There are many times in Spanish when you are required to use the subjunctive, but for now I will explain in detail one common category of uses that tend to cause confusion for Spanish students. This can b...