Sin(30) = 1/2 a) cos(150) = 0 wrong: since cos(150) = cos (180-30) = -√(3)/2 b) cos(60) = 1/2 : right, because sin(30) and also cos(60) space supplements: proof: sin(30) = cos(90-30) = cos 60 c), d) are wrong
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Find the perimeter of the triangle v vertices d(3, 4), e(8, 7), and also f(5, 9). Carry out not round before calculating the perimeter. After calculating the perimeter, round your answer come the nearest tenth.
(Help me please...) If the sin 30° = one over two, climate which statement is true? (6 points) cos 150°...

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