Mastering Olympiad Mathematics
A collection of intriguing competition level problems for secondary school students.
Showing posts with label
linear combination
.
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Showing posts with label
linear combination
.
Show all posts
Wednesday, April 22, 2015
Trigonometric Inequality
Show that :
[math]\left( {\sin x + a\cos x} \right)\left( {\sin x + b\cos x} \right) \leq 1 + \left( \frac{a + b}{2} \right)^2[/math]
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