Question

1-2sin²30° = ?
Please give a suitable explanation to this question. A step-by-step one will be highly appreciated.​

Answer 1

Answer:

½

Step-by-step explanation:

sin 30=1/2

sin²30=1/4

2sin²30=2×1/4=1/2

1-2sin²30=1-½=½

Answer 2

Answer:

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Step-by-step explanation:

we know that,

sin30° = 1/2

then,

= 2sin^2 30°

= 2(1/2)^2

= 2×1/4

= 1/2