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5
Try out this geometry.
Try out this geometry.
Source:
January 16, 2018
geometry
Problem Statement
Show that the triangle whose angles satisfy the equality
sin
2
A
+
sin
2
B
+
sin
2
C
cos
2
A
+
cos
2
B
+
cos
2
C
=
2
\frac{\sin^2A+\sin^2B+\sin^2C}{\cos^2A+\cos^2B+\cos^2C} = 2
cos
2
A
+
cos
2
B
+
cos
2
C
sin
2
A
+
sin
2
B
+
sin
2
C
=
2
is right angled
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