Math, asked by eshamehrotra9dec, 7 months ago

1- cos 2A
19. Using the formula, sin A=
find the value of sin 30°, it
2
1
being given that cos 60° ==.
2​

Answers

Answered by Charmcaster
1

Answer:

sin30°=1/2

Step-by-step explanation:

we know sin²A = (1-cos2A)/2

let A= 30°

sin²30 = (1 - cos60)/2

sin²30 = (1 - 1/2)/2

sin²30 = 1/4

sin30 = √(1/4) = 1/2

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