Question

simplify (1-cosΘ)(1+cosΘ)(1+cos2Θ)

Answer 1

Answer is one because sin²+cos²=1

Answer 2

hello users......
we have to simply
(1-cosΘ)(1+cosΘ)(1+cos2Θ) = ?

solution :-
we know that
a² - b² = (a+b)(a-b)
and
(1+cos 2x) = 2cos²x
and
(1-cos²x) = sin²x

here
(1-cosΘ)(1+cosΘ)(1+cos2Θ)
= (1-cos² Θ) (1+cos2 Θ)
= sin² Θ × 2cos² Θ
= 2sin² Θ cos² Θ answer

✡⭐ hope it helps⭐✡