Use a calculator to find an angle between 180 and 270 for th

Use a calculator to find an angle between 180° and 270° for the given function value. sec = -1.0352, 180°< <270°

sec@ = - 1.0352

1/cos@ = - 1.0352

cos@ = - 1/1.0352 ----------------------------1

@ = cos^-1 ( - 1/1.0352 )

@ = 165 degree

ie from eq 1. cos@ = cos165

cos@ = cos(360- 165 ) ( cos(360 - theta) = cos theta)

cos@ = cos (195)

@ = 195 degree