(sin thetha - cos thetha) whole square = 1-2sin thetha • cos thetha

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Matt Burnell asked Jun 23, 2022

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(sin thetha - cos thetha) whole square = 1-2sin thetha • cos thetha

Mathematics
high-school

Matt Burnell asked Jun 23, 2022

by Matt Burnell

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Answer:

see explanation

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

TehAnswer answered Jun 29, 2022

by TehAnswer

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