Question

The picture shows angles A and B. Explain why sin(B) = sin(A) and why cos(B) = -cos(A).
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Answer 1

Explanation:

A = 45 degrees

B = 225 degrees

sin(225) = -√2/2

sin(45) = √2/2

-sin(45) = -√2/2

cos(225) = -√2/2

cos(45) = √2/2

-cos(45) = -√2/2