cos(x)=-8/17

الحلّ

cos (x) = - \frac{8}{17}

x = 2.06075 \dots + 2 πn, x = - 2.06075 \dots + 2 πn

درجات

x = 118.07248 \dots^{\circ} + 36 0^{\circ} n, x = - 118.07248 \dots^{\circ} + 36 0^{\circ} n

خطوات الحلّ

cos (x) = - \frac{8}{17}

Apply trig inverse properties

cos (x) = - \frac{8}{17}

cos (x) = - \frac{8}{17} :

حلول عامّة لـ

cos (x) = - a \Rightarrow x = arccos (- a) + 2 πn, x = - arccos (- a) + 2 πn

x = arccos (- \frac{8}{17}) + 2 πn, x = - arccos (- \frac{8}{17}) + 2 πn

x = arccos (- \frac{8}{17}) + 2 πn, x = - arccos (- \frac{8}{17}) + 2 πn

أظهر الحلّ بالتمثيل العشريّ

x = 2.06075 \dots + 2 πn, x = - 2.06075 \dots + 2 πn

sin (x) = \frac{6.1}{9.9}

sech (x) = 0

sin^{2} (x) - cos^{2} (x) = 0, (0, 2 π)

tan (α) = - 0.9857

8 sin^{2} (x) = 8 - 4 cos (x)