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Czech and Slovak Olympiad III A
1958 Czech and Slovak Olympiad III A
3
Trigonometric inequality
Trigonometric inequality
Source: Czech and Slovak Olympiad 1958, National Round, Problem 3
June 13, 2024
inequalities
trigonometry
Problem Statement
Find all real
x
x
x
such that
2
+
5
2
cos
x
≤
sin
x
.
\sqrt{2+\frac{5}{2}\cos x}\leq\sin x.
2
+
2
5
cos
x
≤
sin
x
.
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