


Examples
Example 2 Important
Example 3
Example 4
Example 5 Important
Example 6
Example 7 Important
Example 8 Important
Example 9 Deleted for CBSE Board 2022 Exams
Example 10 Important Deleted for CBSE Board 2022 Exams
Example 11 Important Deleted for CBSE Board 2022 Exams
Example 12
Example 13 Important
Example 14 Important You are here
Example 15 Important
Last updated at Dec. 24, 2019 by Teachoo
Example 14 Prove that cot cos /cot + cos =( 1)/( + 1) Taking L.H.S cot cos /cot + cos Writing everything in terms of sin A and cos A = (cos /sin cos )/(cos /sin + cos ) = cos cos sin /(sin /(cos + cos sin /sin )) = ( ( sin ))/(( + sin )) = ( (1 sin ))/( (1 + sin )) = ( (1 sin ))/( (1 + sin )) Dividing sin A on numerator and denominator = ( ((1 sin ))/( ))/( ((1 + sin ))/( )) = ( 1/( ) ( )/( ))/(1/( ) + ( )/( )) = ( 1/( ) 1)/(1/( ) + 1) = ( 1)/( + 1) = R.H.S. So, L.H.S = R.H.S Hence proved