Bantu kak mat wajib kelas 10

Bantu kak mat wajib kelas 10

7/4

Cara :

$dfrac{cos 60^{circ}cdotcot^2 45^{circ}+3csc 30^{circ}}{sin 30^{circ}}$

$Rightarrow dfrac{cos 60^{circ}cdot(1)^2+3(sin 30^{circ})^{-1}}{sin 30^{circ}}qquadqquadcot 45^{circ}=1$

$Rightarrow dfrac{cos 60^{circ}+3(sin 30^{circ})^{-1}}{sin 30^{circ}}$

$Rightarrow dfrac{cos 60^{circ}+3big(cos(90-30)^{circ}big)^{-1}}{cos(90-30)^{circ}}qquadqquadsin x = cos(90^{circ}-x)$

$Rightarrow dfrac{cos 60^{circ}+3(cos 60^{circ})^{-1}}{cos 60^{circ}}$

$Rightarrow dfrac{cos 60^{circ}}{cos 60^{circ}}+dfrac{3(cos 60^{circ})^{-1}}{cos 60^{circ}}$

$Rightarrow 1+dfrac{3(cos 60^{circ})^{-1}}{cos 60^{circ}}$

$Rightarrow 1+3(cos 60^{circ})^{-2}$

$Rightarrow 1+3left(dfrac{1}{2}right)^{-2}$

$Rightarrow 1+dfrac{3}{4} = dfrac{7}{4}$

nb :

cara nulis mtk di brainly

pecahan

dfrac{a}{b}

hasilnya : $dfrac{a}{b}$

pangkat

a^{xy}

hasilnya : $a^{xy}$

akar

sqrt{a+b}

hasilnya : $sqrt{a+b}$

sqrt[n]{a+b}

hasilnya : $sqrt[n]{a+b}$

fungsi trigonometri

sin x , cos x , tan x , sec x , csc x , cot x

hasilnya : $sin x , cos x , tan x , sec x , csc x , cot x$

derajat

a^{circ}

hasilnya : $a^{circ}$

tanda panah

arightarrow b

hasilnya : $arightarrow b$

pRightarrow q

hasilnya : $pRightarrow q$