SOLUTION: Solve this equation for 0 ≤ θ ≤ 2 : sin θ cos θ + cos θ = 0.
a. π/2, 3π/2
b.0, π
c.π/2, -1
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Question 1087691: Solve this equation for 0 ≤ θ ≤ 2 : sin θ cos θ + cos θ = 0.
a. π/2, 3π/2
b.0, π
c.π/2, -1
Answer by math_helper(2461) (Show Source): You can put this solution on YOUR website!
Are you sure the domain of is limited to ? (It looks as though it might really be (?) )
I ask because for none of the answers work because they all have values of outside [0,2].
—
If the domain is then (a) works.
First lets factor out a
= (*)
(*) is zero if or
—
(a)
so (*) is zero
so again (*) goes to zero.
—
(b) does not work because (*) is not zero for or
(c) does not work because (*) is not zero for ( it is zero only for )
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