Question

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

A) tan X = Cos Y
B) Sin X = Tan Y
C) Cos X = Cos Y
D) Cos X = Sin Y

Answer 1

50

Explanation:

i dont knoq

Answer 2

D) Cos X = Sin Y

Explanation:

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

`\cos X=(a)/(b)`

and

`\sin Y=(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