railway RRB Technician Grade 3 Mock Test 2024 Quantitative Aptitude Trigonometry Trigonometric Ratios and Identities
যদি A, B, C সূক্ষ্ম কোণ হয়, যেমন tan(A + B - C) = \(\frac{1}{\sqrt{3}}\), cos(B + C - A) = \(\frac{1}{2}\), এবং sin(C + A - B) = \(\frac{1}{\sqrt{2}}\)। A + B + C এর মান হবে:
1
90°
2
110°
3
170°
4
135°