books the trigonometric formula of the theorem
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# The formal form of the theorem
# General Formulas for Trigonometric Functions
# Trigonometric functions and inverse trigonometric functions
# Other forms of the theorem
# Unofficial statement of the theorem
# trigonometric circle
# Trigonometric functions and their properties
# Properties of Integration of Trigonometric Functions
# Trigonometric functions and their inverse functions
# List of Trigonometric Identities
# differentiation of trigonometric functions
# List of integrals of trigonometric functions
# Pythagorean Trigonometric Identity
# Relationships between inverse trigonometric functions
# Inverse trigonometric functions
# Inverse Trigonometric Integrals
# Trigonometric properties
# Comparison with trigonometric functions
# Definition of Trigonometric Ratios
# Mersenne trigonometric numbers
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Source: wikipedia.org
الصيغة المثلثية للمبرهنة (Info)
هناك صيغة مثلثية مشابهة لمبرهنة سيفا، إذا كان ABC مثلث وكانت النقاط D,E,F تقع على الأضلاع BC,AC,AB على الترتيب، فإن المستقيمات AD,BE,CF تتقاطع في نقطة واحدة O إذا وفقط إذا كان:
