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Mathematics
Savanna Bean
8 March, 05:47
Sin^2 (20°) + cos^2 (20°) =
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Kevin Mccall
8 March, 08:49
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1
Step-by-step explanation:
There is an important trig identity which you must know: (sin x) ^2 + (cos x) ^2 = 1.
Therefore, sin^2 (20°) + cos^2 (20°) = 1
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