In triangle ABC, angle C is the right angle. Which statement is always true? A. Sin (A) = cos (A)

B. Sin (A) = cos (B)

C. Sin (A) = cos (C)

Question

Ralph

14 July, 10:48

+3

Answers (2)

Know the Answer?

Aurora Sherman · Answer 1

The answer is B. Sin (A) = cos (B).

Aimee Frost · Answer 2

Given this, we know:

A+B+90° = 180°

Therefore:

90°-A = B and 90°-B = A

We also know:

sin (A) = a/c

cos (B) = a/c

therefore,

Sin (A) = Cos (B)

In triangle ABC, angle C is the right angle. Which statement is always true? A. Sin (A) = cos (A)B. Sin (A) = cos (B)C. Sin (A) = cos (C)