In the diagram above, ATR is a tangent at the point T; to the circle centre O, if ∠TOB = 145o, find ∠TAO
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1991
The angle of elevation of the top of a tree 39m away from a point on the ground is 30o. Find the height of the tree.
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1991
From the top of a cliff, the angle of depression of a boat on the sea is 60o, if the top of the cliff is 25 m above the sea level, calculate the horizontal distance from the bottom of the cliff to the boat.
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1991
Given that sin 9 = -0.9063, where O \(\leq\) \(\theta\) o \(\leq\) 270o.Find \(\theta\).
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1991
The graph above is a sketch of
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1991
Two towns, P and Q, are on (4oN 40oW) and (4oN 20oE) respectively. What is the distance between them, along their line of latitude? (Give your answer in teems of π and R, the radius of the earth).
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1991
The common ratio of a G.P. is 2. If the 5th term isGreater than the 1st term by 45, find the 5th term,
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1991
The first term a of an A.P is equal to twice theCommon difference d. Find, in terms of d, the 5thTerm of the A.P.
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1991
Find the coordinates of point B.
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1991
The shaded portion shows the outer boundary of the half plane defined by the inequality
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1991
Find the perimeter of the region.
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1991
Find the area of the enclosed region, PXROY correct to the nearest whole number.
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1991
Mrs. Kofi sold an article for C7.50 instead of C12.75. Calculate her percentage of error, correct to one decimal place.
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1991
A car is travelling at an average speed of 80km/hr. Its speed in meters per second (m/s) is
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1991
If 2x + y = 7 and 3x - 2y = 3, by how much is 7x greater than 10?