Bereken. Rond zo nodig af op 2 decimalen.
1p
\(\sin(-\frac{1}{2})\)
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\(\sin(-\frac{1}{2}) = -0{,}47942... ≈ -0{,}48\)
1p
Bereken. Rond zo nodig af op 2 decimalen.
1p
\(\cos(\frac{1}{6} \pi )\)
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\(\cos(\frac{1}{6} \pi ) = \frac{1}{2} \sqrt{3}\)
1p
Reken om. Rond zo nodig af op 2 decimalen.
1p
\(188\degree = \text{......} \text{ } \text{rad}\)
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\(188\degree = {188 \over 180} ⋅ \pi ≈ 3{,}28 \text{ } \text{rad}\)
1p
Reken om. Rond zo nodig af op 2 decimalen.
1p
\(-60\degree = \text{......} \text{ } \text{rad}\)
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\(-60\degree = {-60 \over 180} ⋅ \pi = -\frac{1}{3} \pi \text{ } \text{rad}\)
1p
Bereken. Rond zo nodig af op 2 decimalen.
1p
\(\cos(x) = 0{,}64\)
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\(x = \cos^{-1}(0{,}64) = 0{,}87629... ≈ 0{,}88\)
1p
Bereken op \([0 , 2 \pi ] \text{.}\) Rond zo nodig af op 2 decimalen.
1p
\(\sin(x) = -\frac{1}{2} \sqrt{3}\)
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\(x = 1\frac{1}{3} \pi ∨ x = 1\frac{2}{3} \pi \)
1p
Reken om. Rond zo nodig af op 2 decimalen.
1p
\(1\frac{1}{2} \text{ } \text{rad} = \text{......} \text{ } \text{graden}\)
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\(1\frac{1}{2} \text{ } \text{rad} = {1\frac{1}{2} \over \pi } ⋅ 180 ≈ 85{,}94\degree\)
1p
Reken om. Rond zo nodig af op 2 decimalen.
1p
\(-\frac{2}{3} \pi \text{ } \text{rad} = \text{......} \text{ } \text{graden}\)
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\(-\frac{2}{3} \pi \text{ } \text{rad} = {-\frac{2}{3} \pi \over \pi } ⋅ 180 = -120\degree\)
1p