Functions of Multiple Angles In Exercises 61-68, solve the multiple-angle equation. 61. cos== 0
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A: We can solve this as follows
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A: Let's solve.
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A: NOTE: Refresh your page if you can't see any equations. .
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- Using the Law of Sines In Exercises5–22, use the Law of Sines to solve the triangle.Round your answers to two decimal places.Integrate the equation using the method in trigonometric substition.True or False? In Exercises 71–74, determine whether the statement is true or false. Justify your answer. The difference between the measures of two coterminal angles is always a multiple of 360 when expressed in degrees and is always a multiple of 2#35;960; radians when expressed in radians.
- Think About It In Exercises 67–70, explain why theequation is not an identity and find one value of thevariable for which the equation is not true.67. sin θ = √1 − cos2 θ 68. tan θ = √sec2 θ − 169. 1 − cos θ = sin θ 70. 1 + tan θ = sec θArcsine and ArccosineIn Exercises 71–74, find the exact value of each expression.Evaluating a Trigonometric ExpressionIn Exercises 35–40, find the exact value of theexpression.
- Verifying a Trigonometric IdentityIn Exercises 19–24, verify the identityalgebraically. Use the table feature ofa graphing utility to check your resultnumerically.An airplane flies at an altitude of y= 3 miles toward a point directly over an observer. The speed of the plane is 60” miles per hour. Find the rates ( in radians per hour) at which the angle of elevation is changing when the angle is 45 degrees? 60 degrees? And 70 degrees?Verifying a Trigonometric Identity InExercises 9–18, verify the identity.