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syedairam
@syedairam
June 2021
2
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simplify (1-cosΘ)(1+cosΘ)(1+cos2Θ)
Answers & Comments
sameer05420
Answer is one because sin²+cos²=1
1 votes
Thanks 0
Ankit1408
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⭐✡
2 votes
Thanks 2
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Answers & Comments
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⭐✡