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1 vote
Which relationship in the triangle must be true?

TE
sin(B) = sin(A)
sin(B) = cos(90 - B)
COS(B) = sin(180 - B)
COS(B) = cos(A)

User Jezmck
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2 Answers

4 votes

Cosine stands for "complementary sine." The sine of an angle is the cosine of the complementary angle and vice versa. Complementary angles add to 90°.

Answer: sin(B) = cos(90 - B)

It's true for any angle, and it doesn't have much particularly to do with a triangle.

User Stigkj
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6.8k points
5 votes
COS(B)=sin(180-B).







Because a triangle have a 180 degree angle
User Nishad
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6.4k points