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-rw-r--r--src/solar_python.py6
1 files changed, 3 insertions, 3 deletions
diff --git a/src/solar_python.py b/src/solar_python.py
index a12f18d..6e93621 100644
--- a/src/solar_python.py
+++ b/src/solar_python.py
@@ -794,9 +794,9 @@ def sunrise_equation(latitude, longitude, t = None):
solar_mean_anomaly = int(357.5291 + 0.98560028 * (j_cycle - 2451545)) % 360
# Calculate solar equation of centre
- equation_of_centre = 1.9148 * sin(1 * solar_mean_anomaly)
- equation_of_centre += 0.0200 * sin(2 * solar_mean_anomaly)
- equation_of_centre += 0.0003 * sin(3 * solar_mean_anomaly)
+ equation_of_centre = 1.9148 * math.sin(1 * solar_mean_anomaly)
+ equation_of_centre += 0.0200 * math.sin(2 * solar_mean_anomaly)
+ equation_of_centre += 0.0003 * math.sin(3 * solar_mean_anomaly)
# Calculate solar ecliptic longitude
ecliptic_longitude = (solar_mean_anomaly + 102.9372 + equation_of_centre + 180) % 360