Bereken. Rond zo nodig af op 2 decimalen.
1p
\(\cos(0)\)
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\(\cos(0) = 1 ≈ 1{,}00\)
1p
Bereken. Rond zo nodig af op 2 decimalen.
1p
\(\cos(-\frac{3}{4} \pi )\)
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\(\cos(-\frac{3}{4} \pi ) = -\frac{1}{2} \sqrt{2}\)
1p
Reken om. Rond zo nodig af op 2 decimalen.
1p
\(191\degree = \text{......} \text{ } \text{rad}\)
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\(191\degree = {191 \over 180} ⋅ \pi ≈ 3{,}33 \text{ } \text{rad}\)
1p
Reken om. Rond zo nodig af op 2 decimalen.
1p
\(270\degree = \text{......} \text{ } \text{rad}\)
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\(270\degree = {270 \over 180} ⋅ \pi = 1\frac{1}{2} \pi \text{ } \text{rad}\)
1p
Bereken. Rond zo nodig af op 2 decimalen.
1p
\(\cos(x) = 0{,}79\)
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\(x = \cos^{-1}(0{,}79) = 0{,}65998... ≈ 0{,}66\)
1p
Bereken op \([0 , 2 \pi ] \text{.}\) Rond zo nodig af op 2 decimalen.
1p
\(\cos(x) = 0\)
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\(x = \frac{1}{2} \pi ∨ x = 1\frac{1}{2} \pi \)
1p
Reken om. Rond zo nodig af op 2 decimalen.
1p
\(1\frac{1}{6} \text{ } \text{rad} = \text{......} \text{ } \text{graden}\)
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\(1\frac{1}{6} \text{ } \text{rad} = {1\frac{1}{6} \over \pi } ⋅ 180 ≈ 66{,}85\degree\)
1p
Reken om. Rond zo nodig af op 2 decimalen.
1p
\(1\frac{5}{6} \pi \text{ } \text{rad} = \text{......} \text{ } \text{graden}\)
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\(1\frac{5}{6} \pi \text{ } \text{rad} = {1\frac{5}{6} \pi \over \pi } ⋅ 180 = 330\degree\)
1p