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junior college 1 | H1 Maths
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kristen
Kristen

junior college 1 chevron_right H1 Maths chevron_right Singapore

whats the ans

Date Posted: 2 months ago
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2 months ago
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Erfana Beevee Binte Hassan Shariff
Erfana Beevee Binte Hassan Shariff's answer
238 answers (Tutor Details)
1st
From the graph, 2cos(x) +2 is between 1 and 3. So 2cos (x) +2 > 0 is always true.