Unformatted text preview: 630 – 540 – 450 – 360 – 270 – 180 – 90 90
– 180 270 360 450 540 630 720 90 180 270 360 450 540 630 1
1 The cosine curve – 720 – 630 – 540 – 450 – 360 – 270 – 180 – 90
– sine x
If cosine A = cosine x
If sine A = 1 then A º = 180 n + (–1) n x º
then Aº = 360n ± x º 1. Give the sine values of each of these angles
60º 120º 420º
480º
780º
then write down the next two angles in the sequence. 2. Give the cosine values of each of these angles
50º 310º 410º
670º
770º
then write down the next two angles in the sequence. 3. Give the sine values of each of these angles
30º 150º 210º
330º
390º
510º
570º
then write down the next two angles in the sequence. 4. Give the cosine values of each of these angles
70º 110º 250º
290º
430º
470º
610º
then write down the next two angles in the sequence. 5. Give the three smallest possible positive angles having these sine values
(i) 1 (ii) 0.734 (iii) –0.212 6. Give the three smallest possible positive angles having these cosine values
(i) 1 (ii) 0.406 (iii) –0.653 7. Give the...
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This document was uploaded on 03/01/2014.
 Spring '14

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