Teaching BPSC 4.0 बिहार उच्च माध्यमिक शिक्षक भर्ती (PGT) Mock Test Mathematics Trigonometry Trigonometric Functions
What is the value of (tan 10° tan 80° + tan 20° tan 70° + tan 30° tan 60° + tan 40° tan 50°)?
1
4
2
3
3
5
4
More than one of the above
5
None of the above