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Use the Information Given About the Angle θ,0θ2π\theta , 0 \leq \theta \leq 2 \pi

Question 351

Multiple Choice

Use the information given about the angle θ,0θ2π\theta , 0 \leq \theta \leq 2 \pi , to find the exact value of the indicated trigonometric function.
- sinθ=45,3π2<θ<2π\sin \theta = - \frac { 4 } { 5 } , \frac { 3 \pi } { 2 } < \theta < 2 \pi \quad Find cos(2θ) .\cos ( 2 \theta ) .


A) 2425\frac { 24 } { 25 }

В) 725\frac { 7 } { 25 }

C) 725- \frac { 7 } { 25 }

D) 2425- \frac { 24 } { 25 }

Correct Answer:

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