Buktikan Identitas Trigonometri berikut 1. cos^4x - sin^4x (per) 1 - tan x = cos^2 x + sin x + cos x 2. sin^2x (per) 1 - cos x = 1 + cos x 3. 1 - cos ^4x (per)
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Buktikan Identitas Trigonometri berikut
1. cos^4x - sin^4x (per) 1 - tan x = cos^2 x + sin x + cos x
2. sin^2x (per) 1 - cos x = 1 + cos x
3. 1 - cos ^4x (per) 1 + cos^2x = sin^2x
1. cos^4x - sin^4x (per) 1 - tan x = cos^2 x + sin x + cos x
2. sin^2x (per) 1 - cos x = 1 + cos x
3. 1 - cos ^4x (per) 1 + cos^2x = sin^2x
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