MCQ Practice Mathematics 📖 tan-123+cos-1-213=? A tan-159 B π2 C π4 Favorite Practice Add to Book Explanation & Answer Detailed explanations and answers are restricted. Unlock full access by logging in to your account. 🔒 Unlock the detailed explanation and answers Log In / Sign Up This question appeared in DU KA Unit Question Bank Mathematics 2018-19 Question 16 DU KA Unit Question Bank Mathematics 2018-19 Question 16
