Question

If sinθ = 1 2 and 0° < θ < 90°, then cos 2θ

Answer 1

Answer:

1/2

Step-by-step explanation:

sinθ=1/2

sin 30=1/2

∴θ=30

cos 2θ=cos 2x30

         =cos 60

         =1/2

∴cos 2θ=1/2

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