Use the given information to find the exact value of each of the following. a. sin 2? b. cos 2? c. tan 2? sin ? = 5/9, ? lies in quadrant II a. sin 2? = [?] (Simplify your answer. Type an exact answer, using radicals as needed. Use integers or fractions for any numbers in the expression.)
Added by Krystal W.
Close
Step 1
We can use the angle subtraction formula to find these values. sin(20°) = sin(45° - 25°) cos(20°) = cos(45° - 25°) tan(20°) = tan(45° - 25°) Now, we can use the angle subtraction formulas for sin, cos, and tan: sin(A - B) = sin(A)cos(B) - cos(A)sin(B) cos(A - Show more…
Show all steps
Your feedback will help us improve your experience
Kathleen Carty and 79 other Precalculus educators are ready to help you.
Ask a new question
Labs
Want to see this concept in action?
Explore this concept interactively to see how it behaves as you change inputs.
Key Concepts
Recommended Videos
Use the given information to find the exact value of each of the following. a. sin 2θ b. cos 2θ c. tan 2θ sin θ = 2/9, θ lies in quadrant II a. sin 2θ = b. cos 2θ = c. tan 2θ =
Supreeta N.
Kathleen C.
Recommended Textbooks
Precalculus with Limits
Precalculus
Transcript
18,000,000+
Students on Numerade
Trusted by students at 8,000+ universities
Watch the video solution with this free unlock.
EMAIL
PASSWORD