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secondary 4 | A Maths
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Date Posted: 4 years ago
Views: 217
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Case 2 coming
Date Posted:
4 years ago
Understood
Understood
Hang on, my earlier answer had a mistake. I redo everything. Did wrong substitution in the quadratic formula.
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Follow this one instead
Date Posted:
4 years ago
Answer is 0.6 ,5.6
Oh ya, forgot to reject the two solutions. We must sub back to check the situation since the output of a modulus must also be positive.
First and fourth quadrant ?
Forced to be the first and the fourth quadrants since cos x has to come out as a positive value, so from the sine equation containing all four quadrants, we pick only the first and fourth quadrants.
Because cos x is negative in the second and third quadrants and |Tan x| = negative number has no solution.
Because cos x is negative in the second and third quadrants and |Tan x| = negative number has no solution.
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