Hi

cos^2ø -5/2cosø -3/2=0

factoring

(cosø -3)(cosø + 1/2)= 0

(cosø -3)= 0 

 cosø = 3 

(cosø + 1/2)= 0

    cosø = -1/2

       ø is 120° or 240°

 

RELATED QUESTIONS

Solve equation for all value of ø if ø measure in degrees
2cos^2ø+2=5cosø

 (answered by Tatiana_Stebko)

Solve equation for all value of ø if ø measure in degrees
2cos^2ø+2=5cosø
 (answered by stanbon)

Solve equation for all value of ø if ø measure in degrees
es
cos^2ø -5/2cosø -3/2=0
 (answered by stanbon)

(cosø)(sin2ø)-2sinø+2=0
Solve equation for all value of ø if ø measure in degrees
 (answered by Tatiana_Stebko)

Solve equation for all value of ø if ø measure in degrees... (answered by Tatiana_Stebko)

Solve equation for all value of ø if ø measure in degrees
cos2ø+3cosø... (answered by Tatiana_Stebko)

how to solve all solutions for... (answered by Fombitz)

Solve equation for all value of ø if ø measure in degrees
34)4cos^2ø-4cosø+1 =... (answered by lwsshak3)

I need help with these questions! Thank you so much!
1. Express sec 0- sin0tan0 in terms  (answered by rwm)