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Alex777 [14]
3 years ago
9

Prove that sec(-pi/4) = sqrt2.

Mathematics
1 answer:
Alika [10]3 years ago
3 0
Sec ( -π/4 ) =
 =1 / cos( -π/4 ) =
= 1 / cos (π/4 ) =
= 1  / √2/2 = 2/√2 = √2
( correct )
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