Sin 2 x + 2 sin x = 0
2 sin x cos x + 2 sin x = 0 / : 2
sin x cos x + sin x = 0
sin x ( cos x + 1 ) = 0
sin x = 0, cos x + 1 = 0, cos x = - 1;
Answer:
x = 0, or x = π
Considering the unit circle, it is found that the sine is negative on the third and on the fourth quadrant.
<h3>What is the unit circle?</h3>
For an angle the unit circle is a circle with radius 1 containing the following set of points: .
Hence, from the above explanation, the sine is negative when y is negativem, which is on the third and on the fourth quadrant.
More can be learned about the unit circle at brainly.com/question/16852127
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The sum of the arithmetic series has a formula of
S = (n/2)(a₁ + aₙ)
where
n = number of terms
a₁ = first term
aₙ = last term or nth term
Given n = 50, a₁ = -13, aₙ = 134. The sum is
S = (50/2)(-13 + 134)
S = 3025 (ANSWER)
Answer:
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Although the triangles have an equal angle and two equal sides, they are not necessarily congruent because the angle is not between the sides. As a result, there is not enough information to find the desired angle.