If sec a = 5/4 and a is an angle in quadrant iv find the value of cos a

Question

Yosef Mclaughlin

Mathematics

1 February, 23:05

If sec a = 5/4 and a is an angle in quadrant iv find the value of cos a

+1

Answers (1)

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Tiana Ortiz · Answer 1

We know that

sec a = 5/4

sec (a) = 1/cos (a)

then

cos (a) = 1/sec (a)

cos (a) = 1 / (5/4) = 4/5---> is positive because the function cos is positive in IV quadrant

the answer is cos (a) = 4/5