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Roman55 [17]
3 years ago
12

Which expression is equivalent to cos (70°)?

Mathematics
1 answer:
Readme [11.4K]3 years ago
5 0

Answer:

sin20°

Step-by-step explanation:

Using the cofunction identity

cosx = sin(90 - x) , thus

cos70° = sin(90 - 70)° = sin20°

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