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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: If tan C = 11, find sin C. cos C.Answer: Q 2: The angles of a triangle ABC are in AP and b:c = 31/2:21/2. Find angle A.45 degrees75 degrees60 degrees Q 3: In triangle ABC, a = 50, c = 60, b = 100 degrees, find b.8084.585 Q 4: Find the length of an arc of a circle of radius 10 cm which subtends an angle of 45o at the centre.3/47/45/4 Q 5: In a circle of diamter 40 cm, the length of a chord is 20 cm. Find the length of the minor arc of the chord./35/320/3 Q 6: What is the angle of elevation of the sun when the length of the shadow of a pole is 31/2 times the height of the pole?60o30o90o Q 7: 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?100 metres87.84 metres36.85 metres Q 8: Solve the triangle ABC given that A = 67o, b = 3 cms, c = 2 cms.a = 5 cm, B = 70o19l, C = 39o 41la = 2 cm, B = 73oC = 39o 41la = 2.88 cm, B = 73o19l, C = 39o 41l Question 9: This question is available to subscribers only! Question 10: This question is available to subscribers only!