141k views
22 votes
Given that sin 60° ≈ 0.866, write the
cosine of a complementary angle

2 Answers

8 votes

Answer:

Explanation:

Complement to 60° = 30°

cos(30°) = sin(60°) = 0.866

User Cvincent
by
7.0k points
2 votes

Answer:

0.866.

Explanation:

We use the identity

sin x = cos (90-x)

So the cosine of the complementary angle is also 0.866.

User Sottany
by
8.0k points
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