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1.- If Amelia is 162 cm tall, the height of the lampost is:
Opción 1
a) 2 m
Opción 2
b) 2.5 m
Opción 3
c) 2.6 m
Opción 4
d) 2.7 m
2.- In a right-triangle, the projections of the catheti over the hypotenuse measures 4 and 9 m. Then, the altitude realtive to the hypotenuse measures:
a) 5 cm
b) 6 cm
c) 7.23 cm
d) 6.25 cm
3.- π/6 radians equals:
a) 30o
b) 45o
c) 60o
d) 90o
4.- If cosx = -1,2, then
a) x € II or III quadrant
b) x € I quadrant
c) sinx = -0,1
d) None of them
5.- In a right triangle, knowing that b = 7 cm and B = 25o, then
a) a = 15.01 cm; c = 16.56 cm; C = 65o
b) a = 16.56 cm; c = 15.01 cm; C = 65o
c) a = 15.01 cm; c = 15.01 cm; C = 65o
6.- In a right triangle, knowing that b = 3 cm and c = 5 cm, then
a) B = 40o
b) B = 40o 15' 30''
c) B = 30o 57' 30''
d) B = 30o 57' 49.5''
7. tan(2π/3) =
a) -√3
b) √3
c) √3/3
d) -√3/3
8. cosec(720o)=
a) 0
b) 1
c) Doesn't exist
d) 2
9.- If sin a = -0.3 and a € III quadrant, then calculate the other ratios without using the calculator:
a) cos a = -0.9 and tan a = 0.33
b) cos a = -0.95 and tan a = 0.31
c) cos a = 0.95 and tan a = -0.31
d) cos a = -0.88 and tan a = 0.34
10.- If tan b = 1.5 and b € I quadrant, then calculate the other ratios without using the calculator:
a) sin c = 0.7 and cos b = 0.47
b) sin c = 0.8 and cos b = 0.53
c) sin c = 0.83 and cos b = 0.55
d) sin c = 0.87 and cos b = 0.58
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