10th Class
Mathematics
Introduction to Trigonometry
Question Bank
Introduction to Trigonometery
question_answer
What is the value of \[\text{si}{{\text{n}}^{\text{2}}}\text{5}{}^\circ +\text{si}{{\text{n}}^{\text{2}}}\text{1}0{}^\circ +\text{si}{{\text{n}}^{\text{2}}}\text{8}0{}^\circ +\text{si}{{\text{n}}^{\text{2}}}\text{85}{}^\circ \]?