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Who was responsible for the outbreak of the Cold War? Was America responsible? · President Truman’s use of the atomic bomb in Japan could be seen as a threat, especially as he did not tell Stalin about it be...

The cosine rule is used to find the length of a side or size of an angle. Take a look at the triangle below: For this triangle we have sides a, b and c and angles A,B and C. For this triangle the cosine rule...

Homeostasis is the maintenance of the internal environment to a constant state, despite changes to the external environment. Examples of conditions in the body which must be kept constant include body temper...

You will be presented with two equations, both with two unknown values. For example: 8x-2y=19 and 3x=5+y To begin, we are going to move both unknown terms in the second equation to the same side: 3x-y=5 Then...

First, remember the compound angle formula for cosine: cos (2x) =cos^ 2 (x)-sin^ 2 (x). Now use the identity sin^ 2 (x)+cos^ 2 (x)= 1 to give : cos (2x) =(1-sin^ 2 (x))-sin^ 2 (x)=1 -2sin^ 2 (x) Rearranging ...