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  1. socratic.org › questions › how-do-you-evaluate-sec-pi-1How do you evaluate #sec(pi)#? - Socratic

    May 25, 2016 · May 25, 2016. sec(π) = 1 cos(π) Now you use this trivial identity: cos(π) = (−1) = 1 −1 ⇒ Refine = −1. Answer link.

  2. socratic.org › questions › how-do-you-find-the-exact-value-of-sec-pi-3How do you find the exact value of #sec (-pi/3)#? - Socratic

    Apr 16, 2016 · This problem is simple once we find the definition of sec. sec = 1/cos Let's first convert to degrees from radians. The conversion for radians to degrees 180/pi. 180/pi xx -pi/3 = -60^@ To make this a positive angle, we must subtract 60 from 360, giving us 300^@. This is a special angle, meaning that it gives us an exact answer. However, before applying our special triangle, we must do this by finding the reference angle. A reference angle is the angle between the terminal side of theta to ...

  3. socratic.org › questions › how-do-i-find-the-value-of-sec-piHow do I find the value of #sec(-pi)#? - Socratic

    Sep 6, 2015 · Help. sec (-pi) = -1 Using a unit circle in standard position, the angle (-pi) is a semicircle with its terminal point on the negative X-axis (at (x,y) = -1,0) The length of the hypotenuse will be color (white) ("XXX")sqrt ( (-1)^2+0^2) = 1 and since the definition of sec is color (white) ("XXX")sec = ("hypotenuse")/ ("x-coordinate") (of unit ...

  4. socratic.org › questions › 5a82356511ef6b0dbbd10b92How do you find the exact value of #sec(pi/12)#? - Socratic

    Feb 13, 2018 · See below. We know that secx= 1/cosx. Therefore: sec(pi/12)= 1/cos(pi/12) We know that pi/12 = pi/3 - pi/4. Thus cos(pi/12) = cos(pi/3 - pi/4) The difference formula ...

  5. socratic.org › questions › what-is-the-sec-2-pi-3What is the sec^2 (pi/3)? - Socratic

    Sep 7, 2015 · What is the value of #sin -45^@#? How do you find the trigonometric functions of values that are greater than #360^@#? How do you use the reference angles to find #sin210cos330-tan 135#?

  6. socratic.org › questions › how-do-you-find-the-value-of-sec-2pi-3How do you find the value of sec (2pi/3)? - Socratic

    Jun 29, 2016 · What is the value of #sin -45^@#? How do you find the trigonometric functions of values that are greater than #360^@#? How do you use the reference angles to find #sin210cos330-tan 135#?

  7. socratic.org › questions › how-do-you-evaluate-sec-pi-3-1How do you evaluate #sec(pi/3)#? - Socratic

    Apr 4, 2016 · 2 > secx = 1/cosx rArr sec(pi/3) = 1/cos(pi/3) Using the pi/3 , pi/6 , pi/2 " triangle " with sides of length 1 ,sqrt3 " and " 2 we can obtain the exact value of cos(pi/3) = 1/2 rArr sec(pi/3) = 1/(1/2) = 2

  8. socratic.org › questions › what-is-the-sec-of-pi-4What is the sec of pi/4? - Socratic

    Oct 20, 2015 · Explanation: An angle of π 4 can be represented as a standard triangle with adjacent and opposite side both = 1 and hypotenuse = √2. By definition. sec = adjacent opposite. So. sec(π 4) = 1 1 = 1. Answer link. iOS. Android.

  9. socratic.org › questions › how-do-i-find-the-value-of-sec-pi-12How do I find the value of sec pi/12? - Socratic

    Oct 17, 2015 · sec(π 12) = 1 cosa = 2 √2 + √3. √2 +√3 2 = 1.93 2 = 0.97. OK. Find: sec (pi/12) sec (pi/12) = 1/ (cos pi/12). Find cos (pi/12). Call cos (pi/12) = cos a --> cos 2a = cos ( (2pi)/12) = cos (pi/6) = sqrt3/2 Apply the trig identity: cos 2a = 2cos^2 a - 1. cos 2a = sqrt3/2 = 2cos^2 a - 1 cos^2 a = 1 = sqrt3/2 = (2 + sqrt3)/2 2cos^2 a = (2 ...

  10. socratic.org › questions › sec-2-4Sec^2 (π/4) - Socratic

    Mar 7, 2018 · 25410 views around the world You can reuse this answer ...