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AysviL [449]
3 years ago
11

If angle X and Y are complementary angles, which of the following must be true?

Mathematics
1 answer:
andrey2020 [161]3 years ago
5 0

Answer:

D) Cos X = Sin Y

Step-by-step explanation:

If angle X and Y are complementary angles, as shown in the attachment, then;

\cos X=\frac{a}{b}

and

\sin Y=\frac{a}{b}

We can see clearly that both ratios are the same.

This implies that:

\cos X=\sin Y

Therefore the correct answer from the given options is D

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