Question

Given that cos 42° ~ 0.743, what is the sine of the complementary angle?

Answer 1

cos 42° ~ 0.743

cos 42° = sin(90-42) = sin 58°

So sine of complementary angle also has same value as cos 42.
So sin 58 ~ 0.743

Answer 2

The sine of the complementary angle given that cos 42° = 0.743 is; sin 58° = 0.743

What is the Value of the Complementary angle?

We are given;

cos 42° = 0.743

Now, the sine of the complementary angle will have the same value as cos 42°.

Thus;

cos 42° = sin(90 - 42) = sin 58°

Thus, sine of the complementary angle is;

sin 58° = 0.743

Read more about Complementary angles at; https://brainly.com/question/98924

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