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To answer this question we need to remember the exact trig values.A trick I use for remembering these is the hand rule.For this you label any one of your hands with the set angles starti...

We will mainly be using a whiteboard but here are some notes:Is (x-3) is a factor of f(x), then if x=3, f(x) =0. I.e. x=3 is a solution too. If we know x =3 is a solution we can solve the other 2 roots by...

As we have two equations of x for y we can make these equal to each other. This gives the following:2x² - 7x + 4 = 4x - 1As with any quadratic we want to make it equal to 0. This gives the foll...

X can be found by using the quadratic equation. x = -b plus or minus (b²-4ac)^1/2/2a. We find that x=-5/2 plus or minus (53)^1/2/2.

We are given the second term both as a number and an equation, so we can saya + 6b = 8We can then estimate the fifth term by continuing the pattern of adding 4b to each term in the sequence, which gives:T...