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Question: Answered & Verified by Expert
The value of 2sin12°-sin72° is
MathematicsTrigonometric Ratios & IdentitiesJEE MainJEE Main 2022 (25 Jun Shift 2)
Options:
  • A 51-34
  • B 1-58
  • C 31-52
  • D 31-54
Solution:
1148 Upvotes Verified Answer
The correct answer is: 31-54

To find 2sin12°-sin72 

sin12°+sin12°-sin72

 sin12°+2cos42°sin-30°  sin12°-cos42°

 sin12°-sin48°   2cos30°sin18°

3sin18°=3514  =3154

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