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Mathematics 21 Online
OpenStudy (anonymous):

How are the sin 70° and the cos 20° related? Explain using complete sentences.

OpenStudy (anonymous):

sin 70 = cos 20 as they are cofunctions.

OpenStudy (anonymous):

sin and cos are functions....which means that the sin of one acute angle of a right triangle MUST equal to the cos of the other acute angle of the right triangle.

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