# Interactive video lesson plan for: CCSS.MATH.CONTENT.HSF.TF.C.8 | Apply Trigonometric Identities | Common core math

#### Activity overview:

CCSS.MATH.CONTENT.HSF.TF.C.8 | Apply trigonometric identities| Common core math

http://www.learncbse.in/ncert-class-10-math-solutions/
http://www.learncbse.in/ncert-solutions-for-class-10-maths-chapter-8-introduction-to-trigonometry/
http://www.learncbse.in/rd-sharma-class-10-solutions-chapter-5-trigonometric-ratios/

00:02 Q5. Prove the trigonometric equations using trigonometric identities, where the angles involved are acute angles for which the expressions are defined
00:04 CCSS.MATH.CONTENT.HSF.TF.C.8 Solved question q5 (2)
00:19 Procedure for proving Trigonometric equations
00:41 consider LHS of the trigonometric equation
01:20 algebra maths formulas | Algebraic Expressions and Formulas
USE (a-b)^2 expanding formula
01:58 Use Pythagorian Identity
sin squared theta plus cos squared theta = 1
02:59 Reciprocal Identity.
The ratios cosec A, sec A and cot A are respectively, the reciprocals of the ratios sin A, cos A and tan A
sec A = 1/cos A
03:13 How to prove Trigonometric identities.

03:33 Q5. Prove the trigonometric identities, where the angles involved are acute angles for which the expressions are defined
03:38 CCSS.MATH.CONTENT.HSF.TF.C.8 Solved question q5 (i)
03:58 Procedure for solving Trigonometric equations
04:10 consider LHS of the trigonometric equations
04:20 Reciprocal Identity.
The ratios cosec A, sec A and cot A are respectively, the reciprocals of the ratios sin A, cos A and tan A
Quotient Identity
cot A = cos A / sin A.
08:35 Use Pythagorian Identity
sin squared theta plus cos squared theta = 1
09:35 trigonometric equation is proved

09:48 CCSS.MATH.CONTENT.HSF.TF.C.8 Solved question q5 (10). Prove the trigonometric identities, where the angles involved are acute angles for which the expressions are defined
10:21 Learn how to prove trigonometric identities through our working model.
10:23 consider LHS of the trigonometric equation
10:55 Reciprocal Identity.
The ratios cosec A, sec A and cot A are respectively, the reciprocals of the ratios sin A, cos A and tan A.
cot A = 1 / tan A
11:41 consider middle expression of the trigonometric equation
11:54 use Reciprocal Identity0
13:26 trigonometric identities are proved.

Using the fundemental identities and the Pythagorean Identities
multiple examples of verifying trigonometric identities
How to Solve Trigonometric Identities Proving Problems
method to solve trigonometric identities problems
the Quotient Identities, Reciprocal Identities, and the Pythagorian Identities.

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learncbse.in
CBSE solutions for class 10 maths Chapter 8 Trigonometry Exercise 8.4
CBSE class 10 maths NCERT SolutionsChapter 8 Trigonometry Exercise 8.2 | Trigonometric Identities

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