Ex 3.2, 10 - Find value of cot (-15pi/4) - Trigonometric Functions - Ex 3.2

  1. Chapter 3 Class 11 Trigonometric Functions
  2. Serial order wise
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Ex 3.2, 10 Find the value of the trigonometric function cot ("โ€“ " 15"ฯ€" /4) cot ((โˆ’15 ๐œ‹)/4) = โ€“ cot ((15 ๐œ‹)/4) = โ€“ cot ("3" 3/4 "ฯ€" ) = โ€“ cot ("4ฯ€ โ€“ " 1/4 " ฯ€" ) = โ€“ cot ((โˆ’1)/4 " ฯ€" ) = โ€“ ("โ€“ cot " (1/4 " ฯ€" )) = cot (1/4 " ฯ€" ) = cot (1/4 " ร— 180" ) = cot 45ยฐ = 1

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