Question

The value of Sin²20°+Sin²70° is

Answer 1

sin²(20°) + sin²(70°) = (0.342)² + (0.9397)²

sin²(20°) + sin²(70°) = 0.117 + 0.883

sin²(20°) + sin²(70°) = 1.

Answer 2

sin^2 20+sin^2 70

sin^2 20 + cos^2(90-20)

sin^2 20+ cos^20

1

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