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-rw-r--r--libtellurian_gaussian_radius_radians.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/libtellurian_gaussian_radius_radians.c b/libtellurian_gaussian_radius_radians.c
index 02d0586..7b14ed5 100644
--- a/libtellurian_gaussian_radius_radians.c
+++ b/libtellurian_gaussian_radius_radians.c
@@ -11,7 +11,7 @@ libtellurian_gaussian_radius_radians(double latitude)
double c = b / a;
double neg_e2 = fma(c, c, -1.0);
double neg_e2_plus_1 = c * c;
- double s = sin(latitude);
+ double s = sin(geodetic(latitude));
double denom = fma(neg_e2, s * s, 1.0);
return a * sqrt(neg_e2_plus_1) / denom;
}