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Maths Puzzle
Numerical Ability
express as the confunction of a positive acute angle not using a calculator of ctn 250 degrees.
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book Other Question
In the diagram above, if O is the centre of the circle, then y=
(A) 25 degrees
(B) 80 degrees
(C) 90 degrees
(D) 100 degrees
Which of the following are the factors of 4b^2-16?