Sin^2(20°)+cos^2(20°)=

asked Jan 25, 2021 230k views

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Answer:

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

Isaac Obella answered Jan 31, 2021

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