express sec(-152 degree) as an acute angle
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sec(-152)
= sec(360 + (-152)) (since period of sec is 2pi or 360 degree)
= sec( 208)
= sec (180 + 28)
= - sec (28)
= sec(360 + (-152)) (since period of sec is 2pi or 360 degree)
= sec( 208)
= sec (180 + 28)
= - sec (28)
Answered by
0
SEC[-158] can be expressed as sec28
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