Buktikanlah identities trigonometrI Beirut: A.sin a cos (90derajat -a) cos a sin (90derajat-a=1

(sin a) (cos (90°-a)) + (cos a) (sin (90°-a)) = 1
(sin a) (sin a) + (cos a) (cos a) = 1
sin^2 a + cos^2 a = 1
(identitas dasar, sin^2 a + cos^2 a = 1)
1 = 1

tlg dikoreksi jika ada kesalahan. trims

Materi : Pembuktian Trigono

Pembahasan :
Sin A Cos (90° - A) + Cos A Sin (90° - A) = 1
Sin (A + 90° - A) = 1
Sin 90° = 1
1 = 1

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