Question

if sinA = 1/4 then cosA equals to:

Answer 1

p/h=1/4
B=√16-1=√15
cos A =√15/4

Answer 2

sinA=1/4
sinA=p/h
b=?
b=root under h^2-p^2
b=root under 4^2-1^2
b=root under 16-1
b=root under 15

cosA=b/h
cosA=root under 15/4
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