10th Class
Mathematics
Introduction to Trigonometry
Question Bank
Introduction to Trigonometery
question_answer
Find the value of\[\frac{2}{3}({{\cos }^{4}}{{30}^{o}}-{{\sin }^{4}}{{45}^{o}})\]\[-3({{\sin }^{2}}{{60}^{o}}-{{\sec }^{2}}{{45}^{o}})+\frac{1}{4}{{\cot }^{2}}{{30}^{o}}\]