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#### Online Quiz (WorksheetABCD)

Questions Per Quiz = 2 4 6 8 10

### Geometry8.17 Trignometry Review

 Function 0o 30° 45° 60° 90° sin Ö0/2 Ö1/2 Ö2/2 Ö3/2 Ö4/2 cos Ö4/2 Ö3/2 Ö2/2 Ö1/2 0 tan 0 Ö3/3 1 Ö3 undefined sec 1 2Ö3/3 Ö2 2 undefined csc undefined 2 Ö2 2Ö3/3 1 cot undefined Ö3 1 Ö3/3 0

 sin cos tan 0 0 1 0 90 1 0 infinity 180 0 -1 0 270 -1 0 infinity

Functions of angles in all quadrants in terms of those in quadrant 1
 -A 900 ± A P/2 ± A 1800 ± A P ± A 2700 ± A 3P/2 ± A 3600 ± A 2P ± A sin -sinA cos A ±sin A -cosA ±sin A cos cos A ±sin A -cos A ±sin A cos A tan -tan A ±cot A ± tan A ±cot A ±tan A csc -csc A sec A ± csc A -sec A ±csc A sec sec A ± csc A -sec A ±csc A sec A cot -cot A ± tan A ± cot A ±tan A ± cot A

 Q 1: Find the angle in radian through which a pendulum swings if its length is 75 cm and the tip describes an arc of length 15 cm2/51/31/5 Q 2: In triangle ABC, a= 15 cm, B = 68 degrees, C = 43 degrees, find b, c and B.A = 60 degrees, b = 4 cm, c = 9 cmA = 60 degrees, b = 3 cm, c = 7 cmA = 69 degrees, b = 4.89 cm, c = 10.96 cm Q 3: If the shadow of a tower is 30 metres, when the sun's altitude is 30o, what is the length of the shadow when the sun's altitude is 60o?240 metres200 metres100 metres Q 4: Find the radian measure corresponding to -37o30l.-5/24-5/4-5/8 Q 5: In triangle ABC , if 2 cos A/a + cos B/b + 2 cos C/c = a/bc + b/ca. find angle A90 degrees30 degrees45 degrees Q 6: The angle of elevation of the top of a tower which is yet incomplete at a point 120 metres from its base is 45o. How much higher should it be raised so that the elevation at the same point may become 60o?87.84 metres100 metres36.85 metres Q 7: From the light house the angles of depression of two ships on opposite sides of the light house are observed to be 30o and 45o. If the height of the light house is 300 metres, find the distance between the ships if the line joining them passes through foot of the light house.809 metres800 metres819.6 metres Q 8: The angle of elevation of the top of a tower from a point 60m from its foot is 30o. Find the height of the tower.100 m20 m2031/2 m Question 9: This question is available to subscribers only! Question 10: This question is available to subscribers only!