Question

Sin 30°
(ii) sin 2x = sin 60° cos 30° - cos60° sin 30-​

Answer 1

Answer:

x = 15°

Step-by-step explanation:

sin 2x = sin 60 cos 30° -cos 60° sin 30°

sin 2x = (root 3)/2 *(root 3)/2 - 1/2 * 1/2

sin 2x = 3/4 - 1/4

sin 2x=2/4

sin 2x=1/2

Since sin 30°=1/2 therefore 2x=30°

                                                  x=15°

Answer 2

Answer:

sin2x=1-1

sinx=0

therefore X=0°

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