exam Maths Puzzle Numerical Ability

Express as a trigonometric function of one angle sin44cos22-cos44sin22.
(all Numbers are degrees)

a. cos22
b. cos66
c. sin22
d. sin66

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exam Other Question

Please help. I'm having problems with this.

1) Use the arithmetic sequence of numbers 2, 4, 6, 8, 10� to find the following:
a) What is d, the difference between any 2 terms? A group of 5 friends went to the movies. They found a row with 7 empty seats. In how many ways can the friends be seated in the row?