sara3695 sara3695

04-05-2020
Mathematics

contestada

sin(90-x)=cos(x) use sum or difference formula to solve

Respuesta :

mirai123 mirai123

04-05-2020

Answer:

[tex]sin(90-x)=cos(x)[/tex]

So,

[tex]sin(a-b)=sin(a)cos(b)-cos(a)sin(b)[/tex]

[tex]sin(90\º-x)=sin(90\º)cos(x)-cos(90\º)sin(x)[/tex]

Once, [tex]sin90\º=1[/tex] and [tex]cos(90\º)=0[/tex]

[tex]sin(90\º-x)=1cos(x)-0sin(x)[/tex]

[tex]sin(90\º-x)=cos(x)[/tex]

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