cot² 30° - 2 cos&3178; 30° 3/4 sec² 45° + 1/4 cosec² 30° = ? - - cot& # 178 ; 30° - 2 cos&3178 ; 30° 3/4 sec& # 178 ; 45° + 1/4 cosec& # 178 ; 30° = ? Maths in hindi, trigonometry 1 question answers in hindi pdf 2 3/4 questions in hindi, Know About 1 3/4 Maths online test Maths notes in hindi quiz book 3/4