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babyGu
@babyGu
July 2022
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Помогите решить, пжласт.
Числа 15 с градусами.
(cos15+sin 15)^20
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oganesbagoyan
Verified answer
(cos15°+sin 15°)²⁰ =((cos15°+sin 5°)²) ¹⁰=(cos²15°+ sin²15° +2sin15°*cos15°)¹⁰=
(1 +sin30°)¹⁰ =(1+1/2)¹° = (3/2)¹° =59049/1024 ≈57,7.
0 votes
Thanks 1
babyGu
спасибо больше, а можете решить ещё этот, пожалуйста [2(cos35+isin35]^-12
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Verified answer
(cos15°+sin 15°)²⁰ =((cos15°+sin 5°)²) ¹⁰=(cos²15°+ sin²15° +2sin15°*cos15°)¹⁰=(1 +sin30°)¹⁰ =(1+1/2)¹° = (3/2)¹° =59049/1024 ≈57,7.