Grade 12th passTrigonometry
Find the general values of trigonometric equation :-CosA +SinA =Cos2A + Sin2A . Ans:- 2npi or (2npi)/2+pi/6.
1 Answer
Anomy
According to me......
CosA +SinA = Cos2A +Sin2A
CosA - Cos2A= Sin2A - Sin A
2Sin3A/2SinA/2 = 2cos3A/2SinA/2
Sin3A/2 = Cos3A/2
Tan3A/2=1
Tan3A/2 = Tanπ/4
3A/2 = nπ+π/4
A=2nπ/3+π/6 ...where n belongs to real no.
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