Teaching BPSC बिहार माध्यमिक TGT (9 to 10) शिक्षक भर्ती 4.0 Mock Test Quantitative Aptitude Trigonometry Trigonometric Ratios and Identities
If A + B = 90°, then the expression \(\frac{\cot A}{\cot B}\) + cos2 A + cos2 B is equal to:
1
cot2 B
2
cosec2 A
3
cot2 A
4
More than one of the above
5
None of the above