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secondary 3 | A Maths
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Need help with qn (f) and (d). Thank You
Date Posted: 3 years ago
Views: 228
Part (f)
3sin²(x) = 2
sin²(x) = 2/3
sin(x) = ±√2/3
sin(x) = √2/3 or sin(x) = −√2/3
you should be able to carry on from here
3sin²(x) = 2
sin²(x) = 2/3
sin(x) = ±√2/3
sin(x) = √2/3 or sin(x) = −√2/3
you should be able to carry on from here
Part (d)
2sin²(x)cos(x) - cos(x) = 0
cos(x)(2sin²(x) - 1) = 0
cox(x) = 0 or 2sin²(x) - 1 = 0
2sin²(x) = 1
sin²(x) = 1/2
sin(x) = ±√1/2
sin(x) = √1/2 or sin(x) = -√1/2
you should be able to carry on from here! jiayous! and look at the equations from basics. don’t think too complicated. simplify it as much as you can and move on from there! i’m sure you have the trigo formula table as well so use it to its maximum and all the best!
2sin²(x)cos(x) - cos(x) = 0
cos(x)(2sin²(x) - 1) = 0
cox(x) = 0 or 2sin²(x) - 1 = 0
2sin²(x) = 1
sin²(x) = 1/2
sin(x) = ±√1/2
sin(x) = √1/2 or sin(x) = -√1/2
you should be able to carry on from here! jiayous! and look at the equations from basics. don’t think too complicated. simplify it as much as you can and move on from there! i’m sure you have the trigo formula table as well so use it to its maximum and all the best!
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done
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jiayous!
Date Posted:
3 years ago
Thank You
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