Verify the Trigonometric Function
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Verify the Trigonometric Function

[From: ] [author: ] [Date: 11-10-23] [Hit: ]
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Verify the Trigonometric Function:

(cosx - sinx)(cosx + sinx) = 1 - 2sin^2x

-
cos^2 - sin^2 =

1 - sin^2 - sin^2 =

1 - 2sin^2 =

-
LHS = cos²x – sin²x = (1 – sin²x) – sin²x = 1 – 2sin²x
1
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