CET Maths: Trigonometry & Geometry Shortcut Formulas by sarthak patil

 

📌 Posted by: Sarthak Prakash Patil  

📅 Updated: July 2025


📐 **CET Maths: Important Trigonometry & Geometry Formulas**


🔹 **Trigonometry Formulas**  

sin²θ + cos²θ = 1  

1 + tan²θ = sec²θ  

1 + cot²θ = cosec²θ  

sin(90°–θ) = cosθ  

cos(90°–θ) = sinθ  

tan(90°–θ) = cotθ


🔹 **Value Table (Degrees)**  

θ :  0° 30° 45° 60° 90°  

sinθ: 0 1/2 1/√2 √3/2 1  

cosθ: 1 √3/2 1/√2 1/2 0  

tanθ: 0 1/√3 1 √3 ∞


🔹 **Geometry Formulas**  

– Area of Triangle = ½ × base × height  

– Area of Circle = πr²  

– Circumference = 2πr  

– Volume of Sphere = (4/3)πr³  

– Volume of Cylinder = πr²h  

– Surface Area of Cube = 6a²  


🔸 **CET Tip:**  

- Remember identities using charts  

- Use trick triangles (30°–60°–90° & 45°–45°–90°)  

- Practice formula-based MCQs daily


📚 Blog: Sarthak’s Education Corner



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