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(China) National High School Mathematics League
2023 China Second Round
5
China Second Round Olympiad 2023 Test 1 Q 5
China Second Round Olympiad 2023 Test 1 Q 5
Source: Sep 10, 2023
September 10, 2023
trigonometry
algebra
inequalities
equation
Problem Statement
Find the sum of the smallest 20 positive real solutions of the equation
sin
x
=
cos
2
x
.
\sin x=\cos 2x .
sin
x
=
cos
2
x
.
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