Teaching BPSC 4.0 बिहार उच्च माध्यमिक शिक्षक भर्ती (PGT) Mock Test Quantitative Aptitude Trigonometry Trigonometric Ratios and Identities
If sin A + sin2A = 1 , then the value of cos4A + cos6A is:
1
cos A
2
sin A
3
1
4
More than one of the above
5
None of the above