Class 11 Book Solution from Miscellaneous in Trigonometric Functions of Associated Angles Question No: 59
যদি হয়, \(\theta + \phi = 0\) তবে দেখাও যে, \(sin(120^0-\theta) = cos(30^0-\phi)\)

যদি হয়, \(\theta + \phi = 0\) তবে দেখাও যে, \(sin(120^0-\theta) = cos(30^0-\phi)\)