Buktikan identitas-identitastrigonometri berikut! a. tan α + cot α = sec α csc α

Pembahasan

tan α + co tan α c o s α s i n α ​ + t a n α 1 ​ c o s α s i n α ​ + s i n α c o s α ​ s i n α ⋅ c o s α s i n 2 α + c o s 2 α ​ s i n α ⋅ c o s α 1 ​ s i n α 1 ​ ⋅ c o s α 1 ​ cos ec α ⋅ sec α sec α ⋅ cos ec α ​ = = = = = = = = ​ sec α ⋅ cos ec α sec α ⋅ cos ec α sec α ⋅ cos ec α sec α ⋅ cos ec α sec α ⋅ cos ec α sec α ⋅ cos ec α sec α ⋅ cos ec α sec α ⋅ cos ec α ​ Dengan demikian, identitas trigonometri di atas terbukti benar.