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2f-1=a

When tackling this question you cannot simply multiply what is in the bracket as this this is not fully expanded. First you must rewrite it as (x-2)(x-2). From here we can on expand the brackets by multip...

You find the area of the circle (using radius²* π). You divide your angle by 360 (or by 2π). You multiply the 2 answers and you find the area of the sector.

You factorise it. First, you find a common factor between a, b and c. Then, you find the 2 numbers that multiplied give you c and added give you b. If a=1, then the additive inverse of those 2 numbers ar...

SOH, CAH, TOA explained using an example.