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Question
junior college 2 | H2 Maths
2 Answers Below
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Help plz
Date Posted: 6 years ago
Views: 334
At a glance, you may want to consider that since light travels in the shortest possible path, it is a local minimum. Hope that's a helpful hint to you.
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What happened to your previous qn?
Date Posted:
6 years ago
Maybe you can add in this line before the cosθ₁ = cosθ₂
AC/LC = CB/EC or something like that
AC/LC = CB/EC or something like that
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Since the hint says do not need to find for x. You can just substitute the theta into the final equation.
Date Posted:
6 years ago
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