In Exercises 28–29, find a cofunction with the same value as the ...

Question

In Exercises 28–29, find a cofunction with the same value as the given expression.sin 70°

Accepted Answer

Hello everybody. I have everything. All right. Today, today we're going to bring out this question that states which of the following coal functions has the same value as a sign of 13.9 degrees where the answer choices say A is cosine of 52. degrees. B is cosine of 76.1 degrees. C is cosine of 13.9 degrees and D is cosine of 27.8 degrees. Now, when this question, we should make a note that if zero degrees is less than beta is less than 90 degrees, then sign of theta is equal to co sign of open parentheses, 90 minus the close parentheses. So in our case, we have sine of 13.9 degrees and 13.9 degrees would, would be our theta and that is greater than zero degrees but less than 90 degrees. So that falls within this rule. So we will therefore have that sign of 13.9 degrees is equal to cosine of 90 minus 13.9. So 90 degrees minus 13.9 degrees, which will leave us with cosine of open parentheses, 76.1 degrees close parentheses and that would be it. So thanks to this simple rule that we have, we were able to calculate the core function that has the same value, which is also answer choice B so I hope that was helpful. And until next time.

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In Exercises 28–29, find a cofunction with the same value as the given expression.sin 70°

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