This ques has been asked in 2010. So it is very important ques.
This ques has been taken from the Book ML Aggarwal
Chapter- Trigonometric Identities
Without using trigonometric tables, evaluate the following (i) (sin 35o cos 55o + cos 35o sin 55 o)/ (cosec2 10o – tan2 80 o) (ii) sin2 34o + sin2 56o + 2 tan18o tan 72o – cot2 30o
Question no. 8, class10, 18th chapter