New servers, hooraaaay! More bandwidth, more power.
use 1-cos^2 x = sin^2 x in last part. Attached
They asked for three ordinates - an ordinate is an x value. 3 ordinates means two interval, since each interval has an order at each end. Lot of marks lost cos of this.
I used the identity 1-cos^2 x + sin^2 x and rearranged it to give sin^2 x = 1-cos^2 x
write 1 as x^0 then add one to the power and divide by the new power to give x^1/1=x
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