Question

Jika tan^2 x +1 = a^2 maka sin^2 x =

Answer 1

Tan² x + 1 = a²
sec² x = a²
sec x = a
maka dapat diketahui
sisi miring = a
sisi samping = 1
sisi depan = √(a²-1)

sin² x = (√(a²-1)² / a² = (a² - 1) / a²