lilmackey
22.09.2021 •
Mathematics
(sin thetha - cos thetha) whole square = 1-2sin thetha • cos thetha
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Ответ:
see explanation
Step-by-step explanation:
Using the identity
sin²x + cos²x = 1
Consider the left side
(sinθ - cosθ)² ← expand using FOIL
= sin²θ - 2sinθcosθ + cos²θ
= 1 - 2sinθcosθ
= right side , thus verified
Ответ:
x=2
Step-by-step explanation:
multiple the parenthesis, add like terms, move the constant and then divide