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The sine of 12 degrees is equal to 0.208, rounded to the nearest thousandth. What is the measure of an angle whose cosine is also equal to 0.208?

The sine of 12 degrees is equal to 0.208, rounded to the nearest thousandth. What is the measure of an angle whose cosine is also equal to 0.208?
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The sine of 12 degrees is equal to 0.208, rounded to the nearest thousandth. What is the measure of an angle whose cosine is also equal to 0.208?

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User Secavfr
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7.6k points

1 Answer

7 votes
A basic identity is:

sinα=cos(90-a)

In this case that means:

sin12°=cos(90-12)°

sin12°=cos78°


answered
User Sanshayan
by
8.2k points
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