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Oliga [24]
3 years ago
11

How do you find an exact value for sin of 40 degrees without using a calculator

Mathematics
1 answer:
Cerrena [4.2K]3 years ago
8 0
Sin 40° + sin 130° + sin 220° + sin 310° = ...
sin 130° = sin 50°;
sin 220° = - sin 40°;
sin 310° = - sin 50°
... = sin 40° + sin 50° - sin 40° - sin 50° = 0
Answer: 0.

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<em>Verification,</em>

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Expression second,

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<em><u>Thanks for joining brainly community!</u></em>

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