Question

Simplify ?

Answer 1

we can use first the formula
(a-b)(a+b) = a^2 - b^2
can you apply it here ?

Answer 2

idk if you can but here are the options @hoblos
±sin Θ

±cos Θ

±tan Θ

Answer 3

(1-cos Θ)(1+cos Θ) = 1 - (cos Θ)^2

we know also that (sin Θ)^2 + (cos Θ)^2 = 1

so 1 - (cos Θ)^2 = (sin Θ)^2

(sin Θ)^2 / (cos Θ)^2 = [sin Θ / cos Θ]^2 = (tanΘ)^2

radical( (tanΘ)^2 ) = ±tan Θ

Answer 4

thanks!!

Answer 5

any time :)