Question
upstudy study bank question image url

In right triangle \( \mathrm{ABC}, \mathrm{m} \angle A=90^{\circ}, \sin B=2 x-0.28 \), and \( \cos C=4 x+0.16 \). Solve for \( x \).

Ask by Willis Peterson. in the United States
Jan 23,2025

Real Tutor Solution

Tutor-Verified Answer

Answer

\( x = -0.22 \)

Solution

To solve for \( x \) in the given right triangle \( \mathrm{ABC} \) with \( \angle A = 90^{\circ} \), \( \sin B = 2x - 0.28 \), and \( \cos C = 4x + 0.16 \), we can use the trigonometric identities for sine and cosine in a right-angled triangle. Given: - \( \angle A = 90^{\circ} \) - \( \sin B = 2x - 0.28 \) - \( \cos C = 4x + 0.16 \) We know that in a right-angled triangle, \( \sin B = \cos C \) because the sine of an angle is equal to the cosine of its complementary angle. Therefore, we can equate \( \sin B \) and \( \cos C \) to solve for \( x \): \[ 2x - 0.28 = 4x + 0.16 \] Now, we can solve this equation to find the value of \( x \). Solve the equation by following steps: - step0: Solve for \(x\): \(2x-0.28=4x+0.16\) - step1: Move the expression to the left side: \(2x-4x=0.16+0.28\) - step2: Add and subtract: \(-2x=0.16+0.28\) - step3: Add and subtract: \(-2x=0.44\) - step4: Change the signs: \(2x=-0.44\) - step5: Divide both sides: \(\frac{2x}{2}=\frac{-0.44}{2}\) - step6: Divide the numbers: \(x=-\frac{11}{50}\) The solution to the equation \(2x - 0.28 = 4x + 0.16\) is \(x = -\frac{11}{50}\) or \(x = -0.22\).

Reviewed and approved by the UpStudy tutoring team

error msg
Explain
Simplify this solution

Mind Expander

In a right triangle, the sum of the angles is always 180 degrees. Given that \( \angle A = 90^\circ \), we can deduce that \( \angle B + \angle C = 90^\circ \). This means that \( \sin B = \cos C \). You are given: \[ \sin B = 2x - 0.28 \] \[ \cos C = 4x + 0.16 \] Since \( \sin B = \cos C \), we can set the two expressions equal to each other: \[ 2x - 0.28 = 4x + 0.16 \] To solve for \( x \), first, let's rearrange the equation: \[ 2x - 4x = 0.16 + 0.28 \] \[ -2x = 0.44 \] Now, divide by -2: \[ x = \frac{0.44}{-2} = -0.22 \] So, the solution for \( x \) is: \[ \boxed{-0.22} \]

Related Questions

Latest Trigonometry Questions

Try Premium now!
Try Premium and ask Thoth AI unlimited math questions now!
Maybe later Go Premium
Study can be a real struggle
Why not UpStudy it?
Select your plan below
Premium

You can enjoy

Start now
  • Step-by-step explanations
  • 24/7 expert live tutors
  • Unlimited number of questions
  • No interruptions
  • Full access to Answer and Solution
  • Full Access to PDF Chat, UpStudy Chat, Browsing Chat
Basic

Totally free but limited

  • Limited Solution
Welcome to UpStudy!
Please sign in to continue the Thoth AI Chat journey
Continue with Email
Or continue with
By clicking “Sign in”, you agree to our Terms of Use & Privacy Policy