Question

If sin A = 3/4 then find cos A ​
​

Answer 1

Answer:

sin=Perpendicular/hypotensue

and cos=base/ hypotensue

there for form sinA=3/4

we use pathrogress equation

we get base is equal to=7

therefore cos=7/4

Answer 2

Answer:

sin a=3/4

opp/hyp=3/4

opp=3x

hyp=4x

(3x)^2=(4x)^2 +(adj)^2

9x2= 16x2 +(adj )

(adj)^2 = 9x2-16x2

= -5×2

adj = root 5

cos a = root 5/4

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