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Question
sec 30 degrees / cos 30 degrees
It should be a homework question, right?
Remember this hexagon:
sin -- cos
/ \
/ \
tan 1 cot(ctg)
\ /
\ /
sec -- csc
Any opposite two multiply to get 1
e.g. sinA*cscA=1
Sum of the squares of two numbers on the top of any inverted triangle equals the square of the bottom one:
e.g. (tanA)^2 + 1^2 = (secA)^2
So, sec 30 / cos 30 = 1 / cos^2 30
= 1 / 0.75
= 4 / 3
Hope this solves all the similar question
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Answers by Expert:
Chen Min
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All the conceptual questions, pure math & basic stats alike I am good at answering your algebra (including logarithm, functions, trigonometry) and geometry questions. I can also provide to you a firm understanding into basic calculus and other mathematical ideas and concepts. You can either ask questions in English or Chinese. Physics Qns that require rigorous math are also welcomed Important:Please avoid asking me questions related to economics.After all, I am only a secondary school student
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