maths revision

maths revision

1. sequences

   • To work out the next number in a sequence you have to learn what numbers the sequence goes up in.
     • 1,3,5,7,9,.....,...... figure out the next two numbers in the sequence. To figure out the next two numbers find out what the sequence goes up in which is +2 so the sequence is 1,3,5,7,9,11,13.
     • Figure out this sequence 2,5,10,17,26,....,....
       • The sequence is going up by +2. To get from 2 to 5 is 3 and 5 and then +2 to 3 so its +5 etc.

2. TRIGONOMETRY

   • To work out you have to find out the hypotenuse=h, opposite=o and adjacent=a. You also have to figure out if it is sin=sine, cos=cosine, tan=tangent. The hypotenuse is opposite the right angle of the shape, opposite is the other angle.
     • sin x= o/h, cos x= a/h, tan x = o/a

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