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Poland - Second Round
1989 Poland - Second Round
1
tg 7x - sin 6x=cos 4x - ctg 7x
tg 7x - sin 6x=cos 4x - ctg 7x
Source: Polish MO Recond Round 1989 p1
September 9, 2024
algebra
trigonometry
Problem Statement
Solve the equation
t
g
7
x
−
sin
6
x
=
cos
4
x
−
c
t
g
7
x
.
tg 7x - \sin 6x=\cos 4x - ctg 7x.
t
g
7
x
−
sin
6
x
=
cos
4
x
−
c
t
g
7
x
.
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