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Ex 3.2, 9 - Find value of sin -11pi/3 - Chapter 3 - Finding Value of trignometric functions, given angle

  1. Chapter 3 Class 11 Trigonometric Functions
  2. Serial order wise
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Ex 3.2,9 Find the value of the trigonometric function sin ( โ€“ 11"ฯ€" /3) sin ((โˆ’11 ๐œ‹)/3) = โ€“ sin ((11 ๐œ‹)/3) = โ€“ sin ("3 " 2/3 " ฯ€" ) = โ€“ sin ( 4ฯ€ โ€“ 1/3 ฯ€ ) = โ€“ sin ((โˆ’ 1)/3 " ฯ€" ) = โ€“ ("โ€“ sin " (1/3 " ฯ€" )) = sin (1/3 " ฯ€" ) = sin 60ยฐ = โˆš3/2

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