Ada rumus apa saja untuk sin dan cos?.... Question from @nabilaizza8

RoellyAinulYaqin
1. Sin 30° = 1/2

Sin 45° = 1/2 √2

Sin 60° = 1/2 √3

Sin 90° = 1

2. Cos 0° = 1

Cos 30° = 1/2 √3

Cos 45° = 1/2 √2

Cos 60° = 1/2

Cos 90° = 0

1 votes Thanks 2

farhaanroziallah Sin = depan/miring
cos = samping/miring

aturan sinus
$$\begin{align} \frac{a}{sin \ a} = \frac{b}{sin \ b} = \frac{c}{sin \ c } = 2r \end{align}$

aturan cosinus
>>> aturan kesatu <<<<
$$\begin{align} a ^{2} = b ^{2} + c ^{2} -2bc \ . \ cos \ a \end{align}$
$$\begin{align} b ^{2} = a ^{2} + c ^{2} -2ac \ . \ cos \ b \end{align}$
$$\begin{align} c ^{2} = a ^{2} + b ^{2} -2ab \ . \ cos \ c \end{align}$
>>>> aturan kedua <<<<
$$\begin{align} a = b \ . \ cos \ c + c \ . \ cos \ b \end{align}$
$$\begin{align} b = c \ . \ cos \ a + a \ . \ cos \ c \end{align}$
$$\begin{align} c = a \ . \ cos \ b + b \ . \ cos \ a \end{align}$

2 votes Thanks 1

nabilaizza8 itu di sgitiga siku2 smua kah? (maf bru pemula)

farhaanroziallah tidak .. berlaku untuk semua segitiga ..

nabilaizza8 bisa tlong beri contoh soal serta jwb.n nya?

Jika sin(2x+30°) = a dan cos(x+75°)=b ,maka cos(3x+105°) cos(x-45°) adlh ?

Recommend Questions

Life Enjoy

Get in touch

Social