Question

4) If cos25° = 0.9063, then sin65° =_____0.906________. Explain the reasoning used to answer these two questions

Answer 1

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Explanation:

The sine of an angle is equal to the cosine of that angle minus 90 degrees, and vice versa. Since 65=90-25, the cosine of 25 is equal to the sin of 65. If this is unclear please PM me or comment, and I can help more!