If 2 cos^2 + 3 cos = 2 then find cos
kunal0912:
1/2
Please tell me how did you solve buddy
Did you took cos theta = x
yes
Answers
Answered by
4
hope it will help you
Attachments:
Okay. That's new for me. Well thanks for the answer. If possible please share me the formula you used
Okay okay got it
No, 11th. actually I forgot the formula
so I asked
Ya I know. but sometimes hota hain
Answered by
5
Let cos theta = x
so, 2x^2 + 3x - 2 =0
so, 2x^2 + 4x - x -2 = 0
2x(x+2) -1(x+2) = 0
Hence, x = 1/2 or x = -2
but value of cos theta cannot be -2
Hence cos theta = 1/2
Hence, theta = 60°
Thank you kunal.
wlcm
Similar questions