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If 0° < θ < 90°, is sin θ equal to cos (90° – θ), and for what reason?

If 0° < θ < 90°, is sin θ equal to cos (90° – θ), and for what reason?
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2 votes
If 0° < θ < 90°, is sin θ equal to cos (90° – θ), and for what reason?

asked
User Alexander Keth
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8.4k points

1 Answer

3 votes
Yes since they're complementary angles (you can check on a calculator for ex, sin of 20 = cos of 70)
answered
User Brianfeucht
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8.4k points
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