### Mathematics Class XI

Unit-I: Sets and Functions
Chapter 1: Sets
Unit-II: Algebra
Chapter 5: Binomial Theorem
Chapter 6: Sequence and Series
Unit-III: Coordinate Geometry
Chapter 1: Straight Lines
Chapter 2: Conic Sections
Unit-IV: Calculus
Unit-V: Mathematical Reasoning
Unit-VI: Statistics and Probability
Chapter 1: Statistics
Chapter 2: Probability

# Applications of Trigonometric Formulas

Properties of Triangle:

In any triangle the sides having length respectively. We know, the sum of lengths of two sides of a triangle is greater than the length of the third side. The sum of measures of the internal triangles is equal to (i) Sine Formula:

In any , Some Important Results:

(A) In any , where is the radius of the circumscribing circle of .

(B) If denotes the area of the , the .

(ii) Cosine Formula:

In any ,

(a) (b) (c) (iii) Tangent Formula:

In any ,

(a) (b) (c) It is also known as Napier’s Formula.

(iv) Projection Formula:

In any ,

(a) (b) (c) (v) Area Formula:

In any ,

The area of is given by is the perimeter of the triangle.

(I) (i) (ii) (iii) (II) (i) (ii) (iii) (III)  (i) (ii) (ii)    Scroll to Top