(sec² 60° + 2 cot² 30° - 5 sin² 45° ) का मान है? - - (sec& # 178 ; 60° + 2 cot& # 178 ; 30° - 5 sin& # 178 ; 45°) Ka Maan Hai ? Maths in hindi, trigonometry 3 question answers in hindi pdf 4 questions in hindi, Know About 2 Maths online test Maths notes in hindi quiz book 5