Question

show that sin (180-A)

Answer 1

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Answer 2

Answer:

We expand sin(180⁰+a) using the formula sin(A+B)=sinA cosB + cosA sinB ∴ sin(180⁰+a) = sin180⁰cos a +cos180⁰sina

In this, 180⁰ = 0,cos 180⁰= −1

∴ sin( 180⁰ +a) = − sin a.