Teaching BPSC बिहार माध्यमिक TGT (9 to 10) शिक्षक भर्ती 4.0 Mock Test Quantitative Aptitude Trigonometry Trigonometric Ratios and Identities
2(sin 1° × sec 89° ) + 3 (cos 11° × cosec 79°) + 5 (tan 21° × tan 69°) = ?
1
11
2
12
3
20
4
More than one of the above
5
None of the above