opangunnie
Cos 2x=a-1/a+1 1-2sin²x=a-1/a+1 2sin²x=1-(a-1/a+1) 2sin²x=(a+1-a+1 /a+1) 2sin²x=2/a+1 Sin²x=2/a+1 x ½ Sin²x=1/a+1 Sin x=√1/a+1 Cos x=√1²-(√1/a+1)² =√1-1/a+1 =√a+1-1 /a+1 =√a/a+1 Tan x=√1/a+1 per √a/a+1 =√(1/a+1 x a+1/a =√1/a =√1/a².a =1/a√a 270<2x<360 135<x<180 nilai tan - (kuadran II) Tan x=-1/a√a
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Ini dri mana caranya? Cos x=√1²-(√1/a+1)²
1-2sin²x=a-1/a+1
2sin²x=1-(a-1/a+1)
2sin²x=(a+1-a+1 /a+1)
2sin²x=2/a+1
Sin²x=2/a+1 x ½
Sin²x=1/a+1
Sin x=√1/a+1
Cos x=√1²-(√1/a+1)²
=√1-1/a+1
=√a+1-1 /a+1
=√a/a+1
Tan x=√1/a+1 per √a/a+1
=√(1/a+1 x a+1/a
=√1/a
=√1/a².a
=1/a√a
270<2x<360
135<x<180 nilai tan - (kuadran II)
Tan x=-1/a√a