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High School Mathematics - 210.18 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

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High School Mathematics - 210.18 Trignometry Review

 Q 1: Find the radian measure corresponding to -37o30l.-5/8-5/24-5/4 Q 2: Find the length of an arc of a circle of radius 10 cm which subtends an angle of 45o at the centre.5/47/43/4 Q 3: The sines of the angles of a triangle are in the ratio of 4:5:6, find the ratio of the cosines of the angles.4:5:212:9:22:3:4 Q 4: If in two circlesarcs of the same length subtend angles 60o and 75o at the centre, find the ratio of their radii.2:31:25:4 Q 5: A vertical flagstaff stands on a horizontal plane from a point distant 150 metres from its foot, the angle of elevation of its top is found to be 30o, find the height of the flagstaff.100 metres113.4 metres100.4 metres Q 6: The elevation of a tower at a point 60 metres from it is cot-13/5 Obtain the height of the tower.45 metres110 metres100 metres Q 7: 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.20/3/35/3 Q 8: The angles of a triangle ABC are in AP and b:c = 31/2:21/2. Find angle A.45 degrees75 degrees60 degrees Question 9: This question is available to subscribers only! Question 10: This question is available to subscribers only!