find-the-angle-using-trigonometric-ratios-of-complementary-angles

# Interactive video lesson plan for: Find the Angle using Trigonometric Ratios of Complementary Angles

#### Activity overview:

Find the Angle using Trigonometric Ratios of Complementary Angles

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/

In this video we solve a trigonometric expression by using trigonometric ratios of complementary angles. This is really simple and detail tutirial covers the entire topic complementary angles - trigonometric ratios. In such problems we have to make same numerator & denominator by using the trigonometric ratios of complementary angles relationship.From Complementary Angle Theorem
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, cosec (90° – A) = sec A,

00:02 CBSE class 10 maths NCERT SolutionsChapter 8 Trigonometry Exercise 8.3 Q3. If tan 2A = cot (A – 18°), where 2A is an acute angle, find the value of A.
00:20 Trigonometric Ratios of Complementary Angle- Find the Angle Problems
00:45 use rigonometric ratios of complementary angle
tan (90° – A) = cot A, cot (90° – A) = tan A,
00:28 CBSE class 10 maths NCERT SolutionsChapter 8 Trigonometry Exercise 8.3 Q4. If tan A = cot B, prove that A + B = 90°.
03:05 trigonometric ratios of complementary angle
cot (90° – A) = tan A, tan (90° – A) = cot A,
04:02 CBSE class 10 maths NCERT SolutionsChapter 8 Trigonometry Exercise 8.3 Q5. If sec 4A = cosec (A – 20°), where 4A is an acute angle, find the value of A.
04:56 trigonometric ratios of complementary angle, sec (90° – A) = cosec A, cosec (90° – A) = sec A,

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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
CBSE class 10 maths NCERT Solutions Chapter 8 Trigonometry
Solutions for CBSE class 10 Maths Trigonometry
NCERT solutions for class 10 maths Trigonometry
NCERT solutions for CBSE class 10 maths Trigonometry
CBSE class 10 maths Trigonometry
Common core Math Trigonometry

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