Quantitative Aptitude Trigonometry Trigonometric Ratios and Identities

ഒരു ത്രികോണത്തിൽ, ∠ B = 90° and ∠ A = 30°ആണെങ്കിൽ, sin2 A – cos2 A + tan2 A:

1
– 3/12
2
1/6
3
2/6
4
– 1/6

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