By definition of tangent,
tan(2<em>θ</em>) = sin(2<em>θ</em>) / cos(2<em>θ</em>)
Recall the double angle identities:
sin(2<em>θ</em>) = 2 sin(<em>θ</em>) cos(<em>θ</em>)
cos(2<em>θ</em>) = cos²(<em>θ</em>) - sin²(<em>θ</em>) = 2 cos²(<em>θ</em>) - 1
where the latter equality follows from the Pythagorean identity, cos²(<em>θ</em>) + sin²(<em>θ</em>) = 1. From this identity we can solve for the unknown value of sin(<em>θ</em>):
sin(<em>θ</em>) = ± √(1 - cos²(<em>θ</em>))
and the sign of sin(<em>θ</em>) is determined by the quadrant in which the angle terminates.
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We're given that <em>θ</em> belongs to the third quadrant, for which both sin(<em>θ</em>) and cos(<em>θ</em>) are negative. So if cos(<em>θ</em>) = -4/5, we get
sin(<em>θ</em>) = - √(1 - (-4/5)²) = -3/5
Then
tan(2<em>θ</em>) = sin(2<em>θ</em>) / cos(2<em>θ</em>)
tan(2<em>θ</em>) = (2 sin(<em>θ</em>) cos(<em>θ</em>)) / (2 cos²(<em>θ</em>) - 1)
tan(2<em>θ</em>) = (2 (-3/5) (-4/5)) / (2 (-4/5)² - 1)
tan(2<em>θ</em>) = 24/7
Answer:
The missing length is 64
Step-by-step explanation:
In the given figure
∵ The triangle is a right triangle
∵ There is a line drawn from the right angle ⊥ to the hypotenuse
→ <em>There is a relation between the side of length 60, the part of the </em>
<em> length 36, and the length of the hypotenuse</em>
∵ The length of the hypotenuse = x + 36
∴ (60)² = 36 × (x + 36)
→ Multiply the bracket by 36
∴ 3600 = 36(x) + 36(36)
∴ 3600 = 36x + 1296
→ Subtract 1296 from both sides
∵ 3600 - 1296 = 36x + 1296 - 1296
∴ 2304 = 36x
→ Divide both sides by 36 to find x
∴ 64 = x
∴ The missing length is 64
Answer:
is the required answer.
Step-by-step explanation:
Best Regards!
The remainder is 8 in the given synthetic division problem. which is the correct answer would be option (B).
<h3>What is the division operation?</h3>
In mathematics, divides left-hand operands into right-hand operands in the division operation.
In the given synthetic division, the coefficients of terms are 4,6, and -2.
Fill in the first coefficient as it appears on the bottom line.
Now multiply 1 by 4 and write the result (i.e., 4) underneath the second coefficient in the center line.
Now multiply 6 by 4 and write the result (i.e., 10) in the bottom row.
Now multiply 1 by 10 and write the result (i.e., 10) below the third coefficient in the center line.
Now add -2 with 10 and write the result (i.e., 8) in the bottom row.
The first two terms now indicate the polynomial coefficient, while the last term shows the remainder.
Therefore, the remainder is 8 in the given synthetic division problem.
To learn more about the division operation click here :
brainly.com/question/25870256
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Answer:
it is 61.3
Step-by-step explanation: