Trigonometry
Telangana Board · Class 10 · Mathematics
All formulas from Trigonometry in Telangana Board Class 10 Mathematics. Key equations, constants, and identities for board exam preparation.
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Formulas
1. Right Triangle Basics
sin A = BC/AC = (opposite side)/(hypotenuse)
cos A = AB/AC = (adjacent side)/(hypotenuse)
tan A = BC/AB = (opposite side)/(adjacent side)
cosec A = 1/sin A = Hypotenuse/Opposite side
sec A = 1/cos A
2. Special Angles and Not Defined Ratios
sin 0° = 0
cos 0° = 1
tan 0° = 0
sin 90° = 1
cos 90° = 0
3. Important Identities
cos^2 A + sin^2 A = 1
1 + tan^2 A = sec^2 A
cot^2 A + 1 = cosec^2 A
4. Complementary Angles
sin(90°-A)=cos A
cos(90°-A)=sin A
tan(90°-A)=cot A
cot(90°-A)=tan A
sec(90°-A)=cosec A
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