given cosθ = - 4/5, 90° ≤ θ ≤ 180° and sin β = - 4/11, 270° ≤ β ≤ 360°

Sketch a diagram for each angle, show important information.

in Trigonometry Answers by Level 1 User (320 points)
reshown by

Your answer

Your name to display (optional):
Privacy: Your email address will only be used for sending these notifications.
Anti-spam verification:
To avoid this verification in future, please log in or register.

2 Answers

by Level 8 User (30.1k points)

θ is the obtuse angle in the 2nd quadrant. cosθ=-4/5 because the adjacent side is in the negative (x is -4). θ is approximately 143.1º.

β is the reflex angle in the 4th quadrant. sinβ=-4/11 because the opposite side is in the negative (y is -4). β is approximately 338.7º.

The hypotenuse is always a positive number.

I emailed the diagrams.

 

by Top Rated User (1.1m points)

Related questions

1 answer
prove: cot(θ/2) sinθ = 1+cosθ
asked Dec 3, 2011 in Trigonometry Answers by anonymous | 762 views
Welcome to MathHomeworkAnswers.org, where students, teachers and math enthusiasts can ask and answer any math question. Get help and answers to any math problem including algebra, trigonometry, geometry, calculus, trigonometry, fractions, solving expression, simplifying expressions and more. Get answers to math questions. Help is always 100% free!

Most popular questions within the last 3000 days

  1. 50+50-25X0+2+2= (19)
  2. it takes 10 road workers 5 days to complete a road repair when working 2 hours a day.Working at the same pace,how many days will it take 2 people working 5 hours a day to finish it? (3)
  3. complete the following. 825 use each digit once .make the two smallest 3 digit numbers and two largest 3-digit number (2)
  4. Solve 15 -1(12÷4+1)? (4)
  5. 8:4(5+2) (3)

Most popular tags

87,542 questions
99,806 answers
2,417 comments
523,412 users