if sin a =3/5 calculate cos A
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use formula sin²A + Cos²A = 1
Trox97:
sin^2(a)+cos^2(a)=1 put sin(a) as 3/5 so you get sin^2(a) as 9/25 and upon shifting (1-(9/25) you get 16/25 so root of 16/25 is 4/5 that's your answer.
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Given that sin=35, and sin=ac, therefore a=3,c=5 . Using the Pythagorean theorem, b=4.
Solving now for the other functions plug in the values.
cosθ=bc=45
tanθ=ab=34
cscθ=53
secθ=54
cotθ=43
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