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secondary 4 | A Maths
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help 6(i) i don understand the ans key
why cosAx = -1 for minimum value ?
Date Posted: 7 years ago
Views: 328
Range of all cosine is -1 =< cos x =< 1
Same for all sine, -1 =< sin x =< 1
Therefore, minimum f happens when the cosine is minimum, because f = sum of two values...
Same for all sine, -1 =< sin x =< 1
Therefore, minimum f happens when the cosine is minimum, because f = sum of two values...
ok thank u !!!
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done
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clear
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the 3 in 3cosA(x) is the amplitude of the graph, which means how far the maximum and minimum point is from the line cutting the centre of the graph horizontally
"+B" is shifting of the graph upwards such that the line cutting through ths graph is shifted upawards (the same line as mentioned above)
"+B" is shifting of the graph upwards such that the line cutting through ths graph is shifted upawards (the same line as mentioned above)
Date Posted:
7 years ago
yup i know im actually asking for (i) but someone commented and helped me le , thanks anyway !!!
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