Textbook Question
Use the given information to find the quadrant of s + t. See Example 3.
sin s = 3/5 and sin t = -12/13, s in quadrant I and t in quadrant III
978
views
6. Trigonometric Identities and More Equations
Sum and Difference Identities
Back6. Trigonometric Identities and More Equations
Sum and Difference Identities
- Textbook Question
Use the given information to find sin(s + t). See Example 3.
cos s = -15/17 and sin t = 4/5, s in quadrant II and t in quadrant I
733views - Textbook Question
Use the given information to find tan(s + t). See Example 3.
cos s = -15/17 and sin t = 4/5, s in quadrant II and t in quadrant I
587views - Textbook Question
Use the given information to find the quadrant of s + t. See Example 3.
cos s = - 15/17 and sin t = 4/5, s in quadrant II and t in quadrant I
599views - Textbook Question
Use the given information to find sin(s + t). See Example 3.
cos s = -1/5 and sin t = 3/5, s and t in quadrant II
701views - Textbook Question
Use the given information to find tan(s + t). See Example 3.
cos s = -1/5 and sin t = 3/5, s and t in quadrant II
652views - Textbook Question
Use the given information to find the quadrant of s + t. See Example 3.
cos s = -1/5 and sin t = 3/5, s and t in quadrant II
785views - Textbook QuestionUse the formula for the cosine of the difference of two angles to solve Exercises 1–12. In Exercises 1–4, find the exact value of each expression.cos(45° - 30°)1163views
- Textbook QuestionUse the formula for the cosine of the difference of two angles to solve Exercises 1–12.In Exercises 1–4, find the exact value of each expression. ( 2π π )cos ------- ﹣ ------ ( 3 6 )508views
- Textbook QuestionIn Exercises 5–8, each expression is the right side of the formula for cos (α - β) with particular values for α and β. b. Write the expression as the cosine of an angle.cos 50° cos 20° + sin 50° sin 20°606views
- Textbook QuestionIn Exercises 5–8, each expression is the right side of the formula for cos (α - β) with particular values for α and β. c. Find the exact value of the expression.cos 50° cos 20° + sin 50° sin 20°634views
- Textbook QuestionIn Exercises 5–8, each expression is the right side of the formula for cos (α - β) with particular values for α and β. b. Write the expression as the cosine of an angle.5π π 5π πcos ------- cos -------- + sin -------- sin -------12 12 12 12596views
- Textbook QuestionIn Exercises 5–8, each expression is the right side of the formula for cos (α - β) with particular values for α and β. c. Find the exact value of the expression.5π π 5π πcos ------- cos -------- + sin -------- sin -------12 12 12 12664views
- Textbook QuestionUse one or more of the six sum and difference identities to solve Exercises 13–54.In Exercises 13–24, find the exact value of each expression.cos(135° + 30°)710views
- Textbook QuestionIn Exercises 57–64, find the exact value of the following under the given conditions:a. cos (α + β)3 5sin α = ------ , α lies in quadrant I, and sin β = ------- , β lies in quadrant II.5 13749views