Sunday

February 1, 2015

February 1, 2015

Posted by **fred** on Wednesday, August 17, 2011 at 9:57pm.

- trig -
**Reiny**, Wednesday, August 17, 2011 at 10:10pmwe know cos 5π/6 = =√3/2 and sin 5π/6 = 1/2

so

4(cos 5Pie/6 + i sin 5 pie/6)

= 4(-√3/2 + i(1/2) )

= -2√3 + 2i

**Answer this Question**

**Related Questions**

Trig (math) - 1.) Write the complex number in trigonometric form r(cos theta + i...

TRIG! - Posted by hayden on Monday, February 23, 2009 at 4:05pm. sin^6 x + cos^6...

Math - Write each complex number in rectangular form? I need help with this. :/ ...

maths - Choose the two options which are true for all values of x 1) cos (x) = ...

trig - it says to verify the following identity, working only on one side: cotx+...

trig 26 - simplify to a constant or trig func. 1. sec Ču-tan Ču/cos Čv+sin Čv ...

Trig - how do i find the exact value of s [pie/2, pie] sin s = radical2/ whole ...

pre calc trig check my work please - sin x + cos x -------------- = ? sin x sin ...

Calculus grade 12 - solve for (<_ = less than or equal to / pie = pie sign...

trig - sin^2(3 theta+5pie)+cos^2(3 theta+5pie)= ?