ICSE Class 9 Answered
cos18-sin18
Asked by bhuvanajajimoggala0 | 20 Dec, 2023, 18:41: PM
cos18-sin18 = cos(45-27) - sin(45-27)
RHS = cos45 cos27 + sin45 sin27 - sin45 cos27 + cos45sin27
Sum of first term and third term of RHS is zero because cos45 = sin45 = 1/√2
Hence we get ,
RHS = sin45 sin27 + cos45sin27 = (2/√2 ) sin27 = √2 sin27
Answered by Thiyagarajan K | 20 Dec, 2023, 20:04: PM
Application Videos
Concept Videos
ICSE 9 - Maths
Asked by 2016159 | 16 Jul, 2024, 19:30: PM
ICSE 9 - Maths
Asked by 2016159 | 12 Jul, 2024, 20:11: PM
ICSE 9 - Maths
Asked by drishtiawasthi007 | 23 Jun, 2024, 12:26: PM
ICSE 9 - Maths
Asked by bhuvanajajimoggala0 | 20 Dec, 2023, 18:41: PM
ICSE 9 - Maths
Asked by bhuvanajajimoggala0 | 16 Dec, 2023, 05:45: AM
ICSE 9 - Maths
Asked by priyapal1106 | 11 Feb, 2021, 20:01: PM
ICSE 9 - Maths
Asked by natashagupta50.9spicertl | 30 Sep, 2020, 15:41: PM
ICSE 9 - Maths
Asked by maheshranjan253 | 18 Aug, 2020, 19:46: PM