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senx=z ==> -1 ≤ z ≤ 1
cosx=z ==> -1 ≤ z ≤ 1
sena= K + 1 ==> -1 ≤ K + 1 ≤ 1
-1 ≤ K + 1 ==> -2 ≤ K e K + 1 ≤ 1 ==> K≤0
-2 ≤ K ≤ 0
cosa=K/2 ==> -1 ≤ K/2 ≤ 1
-1 ≤ K/2 ==> -2 ≤ K e K/2 ≤ 1 ==> K ≤ 2
-2 ≤ K ≤ 2
-2 ≤ K ≤ 0 ________(-2)xxxxxxxxxxxx(0)____________________
-2 ≤ K ≤ 2 ________(-2)xxxxxxxxxxxx(0)xxxxxxxxxxxxx(2)_____
(-2 ≤ K ≤ 0 )∩ ________(-2)xxxxxxxxxxxx(0)____________________
(-2 ≤ K ≤ 2)
S={K ∈ R | -2 ≤ K ≤ 0}
senx=z ==> -1 ≤ z ≤ 1
cosx=z ==> -1 ≤ z ≤ 1
sena= K + 1 ==> -1 ≤ K + 1 ≤ 1
-1 ≤ K + 1 ==> -2 ≤ K e K + 1 ≤ 1 ==> K≤0
-2 ≤ K ≤ 0
cosa=K/2 ==> -1 ≤ K/2 ≤ 1
-1 ≤ K/2 ==> -2 ≤ K e K/2 ≤ 1 ==> K ≤ 2
-2 ≤ K ≤ 2
-2 ≤ K ≤ 0 ________(-2)xxxxxxxxxxxx(0)____________________
-2 ≤ K ≤ 2 ________(-2)xxxxxxxxxxxx(0)xxxxxxxxxxxxx(2)_____
(-2 ≤ K ≤ 0 )∩ ________(-2)xxxxxxxxxxxx(0)____________________
(-2 ≤ K ≤ 2)
S={K ∈ R | -2 ≤ K ≤ 0}
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