Solve for x in RADIANS: sec2x = 2 ?

1 Answer
sankarankalyanam
Apr 17, 2018

#color(brown)(x = 30^@#

Explanation:

#sec 2x = 2#

#1 / (cos 2x )= 2#

#2 cos 2x = 1#

#cos 2x = (1/2)#

http://www.suresolv.com/basic-maths/basic-and-rich-trigonometry-concepts-and-its-applications

#cos theta = 1/2 when" " theta = 60^@#

#:. cos 2x = 1/2 = cos 60#

Hence, #2x = 60 " or " "color(brown)(x = 60 / 2 = 30^@#

Related questions
Impact of this question
1559 views around the world
You can reuse this answer
Creative Commons License