sin 20° cos 70° + sin 70 ° cos 20°
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sin20° cos70° + sin70° cos20° = cos(90° – 20°)cos70° + sin70° sin(90° – 20°) = cos 70° cos70° + sin70° sin70° = cos270° + sin270° = 1Read more on Sarthaks.com - https://www.sarthaks.com/649207/the-value-of-sin20-cos70-sin70-cos20-
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The value of (sin20° cos70° + sin70° cos20°) is 1. sin20° cos70° + sin70° cos20° = cos(90° – 20°)cos70° + sin70° sin(90° – 20°) = cos 70° cos70° + sin70° sin70° = cos270° + sin270° = 1Read more on Sarthaks.com - https://www.sarthaks.com/649207/the-value-of-sin20-cos70-sin70-cos20-is
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