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Questions Per Quiz = 2 4 6 8 10

### Geometry8.17 Trignometry Review

 Function 0o 30� 45� 60� 90� sin �0/2 �1/2 �2/2 �3/2 �4/2 cos �4/2 �3/2 �2/2 �1/2 0 tan 0 �3/3 1 �3 undefined sec 1 2�3/3 �2 2 undefined csc undefined 2 �2 2�3/3 1 cot undefined �3 1 �3/3 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: Solve the triangle ABC given that A = 67o, b = 3 cms, c = 2 cms.a = 2 cm, B = 73oC = 39o 41la = 5 cm, B = 70o19l, C = 39o 41la = 2.88 cm, B = 73o19l, C = 39o 41l Q 2: Show that cot x.cot 2x - cot 2x cot 3x - cot 3x cot x = 1Answer: Q 3: cos 75oAnswer: Q 4: 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?Answer: Q 5: Find the radian measure corresponding to -37o30l.-5/8-5/24-5/4 Q 6: The angles of a triangle ABC are in AP and b:c = 31/2:21/2. Find angle A.75 degrees60 degrees45 degrees Q 7: The angular elevation of a tower from a point is 30 degrees at a point in a horizontal line to the foot of the tower and 100 metres near it is 60 degrees, find the distance of the first point from the tower. 100 metres86.6 metres150 metres Q 8: 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. /320 /35 /3 Question 9: This question is available to subscribers only! Question 10: This question is available to subscribers only!