यदि tan² 45° - cos² 30° = x sin 45° cos 45° हो तो x = ? - - Yadi tan& # 178 ; 45° - cos& # 178 ; 30° = x sin 45° cos 45° Ho To x = ? Maths in hindi, trigonometry - 2 question answers in hindi pdf 1/2 questions in hindi, Know About 2 Maths online test Maths notes in hindi quiz book - 1/2