to work out the next number in the sequence you
to learn what the other numbers are and what
goes between to figure it out
1,3,5,7,9 so in the middle of these are 2 so the next number is 11
trigonometry
tan cos and sin
to work it out you have to work out the
hypotenuse=h, opposite=o and the
adjacent=a. the hypotenuse is opposite the
right angle of the shape. opposite is the other
angle