exam Maths Puzzle Numerical Ability

Find the rectangular coordinate of the point P on the unit circle that corresponds to

t = - pi/2

a. (-1,0)
b. (0.-1)
c. (0,1)
d. (1,0)

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exam Other Question

Write the equation x(x - 10) + 9 = 0 in quadratic form and then solve it by factoring A student walks and jogs to college each day. The student averages 5 km/h walking and 9 km/h jogging. The distance from home to college is 8 km, and the student makes the trip in 1 hour. How far does the student jog?
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