Solved problems on Trigonometric Ratios of Complementary Angles and trigonometric identities
In this video we evaluate a trigonometric expression by using trigonometric ratios of complementary angles. This is really simple. In such problems we have to make same numerator & denominator by using the trigonometric ratios of complementary angles relationship.
solve problems based on trigonometric ratios of complementary angles
Trigonometry - The Complementary Angle Theorem
use some trigonometric ratios of complementary angle
00:02 CBSE class 10 maths NCERT Solutions Chapter 8 Trigonometry Exercise 8.4 Q3(2)
00:55 Trigonometric Ratios of Complementary Angles
Two angles are said to be complementary if their sum equals 90° pair of complementary angles A and 90° – A .
sin (90° – A) = cos A, cos (90° – A) = sin A ,
02:44 CBSE class 10 maths NCERT Solutions Chapter 8 Trigonometry Exercise 8.4 q4. Choose the correct option. Justify your choice.
02:48 Solve trigonometric expressions (i)
03:15 Use Pythagorian Identity
secant squared theta minus tan squared theta = 1
03:28 Solve trigonometric expressions(ii)
substitute the given angles
04:16 simplifying radicals
04:45 Solve trigonometric expressions(iii)
05:10 reciprocal identity
05:54 Use Pythagorian Identity
sin squared theta plus cos squared theta = 1
06:24 Solve trigonometric expressions(iv)
06:45 reciprocal identity
CBSE solutions for class 10 maths Chapter 8 Trigonometry Exercise 8.3
CBSE class 10 maths NCERT Solutions Chapter 8 Trigonometry Exercise 8.4 | Trigonometric Identities
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