Cos 120° + tan 135° – sin 210° = … tolong cepet y plis​

Jawaban:

cos 120⁰ = cos (90 + 30⁰) = -sin 30⁰ = -1/2

Tan 135⁰ = Tan (90⁰+45⁰) = -cot 45⁰ = 1

sin 210⁰ = sin (180⁰+30⁰) = -sin 30⁰ = -1/2

cos 120⁰ + Tan 135⁰ – sin 210⁰

= (-1/2) + 1 + (-1/2)

=(-2/2) + 1

= -1 + 1

= 0