Buktikan identitas trigonometri SinA . Cot kuadrat A/ cos A=1/tan A

Trigonometri

sin a . cot² a / cos a = 1/tan a
(sin a . ( (cos² a)/(sin² a)) ) / cos a = cot a
(cos² a/ sin a) / cos a = cot a
(cos² a / sin a) × 1/cos a = cot a
(cos a / sin a ) = cot a
cot a = cot a

Terbukti


Bisa juga :

sin a . cot² a / cos a = 1/tan a

(sin a / cos a) . (1/tan² a) = 1/tan a

(tan a ) . 1/ (tan² a) = 1/tan a
1/tan a = 1/tan a

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