Question

Determine o valor de;​

Answer 1

b)

$\sin150\degree=\sin30\degree=\dfrac{1}{2}$

$\cos150\degree=-\cos30\degree=-\dfrac{\sqrt{3}}{2}$

c)

$\sin210\degree=-\sin30\degree=-\dfrac{1}{2}$

$\cos210\degree=-\cos30\degree=-\dfrac{\sqrt{3}}{2}$

$\sin240\degree=-\sin60\degree=-\dfrac{\sqrt{3}}{2}$

$\cos240\degree=-\cos60\degree=-\dfrac{1}{2}$

d)

$\sin300\degree=-\sin60\degree=-\dfrac{\sqrt{3}}{2}$

$\cos300\degree=\cos60\degree=\dfrac{1}{2}$

$\sin330\degree=-\sin30\degree=-\dfrac{1}{2}$

$\cos330\degree=\cos30\degree=\dfrac{\sqrt{3}}{2}$