How do you convert 135 degrees to radians?
How do you convert 135 degrees to radians?

How to use de moivre’s theorem to express ⅙ sin 6θ / sin θ as a polynomial in cos θ?
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Two pillars of equal height stand on either side of a road-way which is 60 m wide. At a point in the road-way between the pillars, the elevation of the top of the pillars is 60° and 30°. The height of the pillar is:
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Two distinct numbers are picked randomly from the first ten natural numbers. Find the probability that the L.C.M of the two numbers is 6.
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How many two digit numbers are divisible by 5 such that remainder is 1.
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How many two digit numbers are divisible by 4?
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