Anyone help with the answer to the following questions:

Question 1 - Using Maclaurin’s series find the first 4 terms of the expansion of Sinh(2x)

Question 2 - Review the expression 5.5Cost + 7.8 Sin tand solve fortfor values in the range 0 ≤t≤ 2πrad;5.5Cost + 7.8 Sin t = 4.5

Question 3 - An oil company drills a well 10kms deep. Estimate the total cost of drilling if the cost is £20 for drilling the first metre with an increase of £3 per metre for each succeeding metre