Question

If sin = cos , find the value of 2tan2 - sin2 -1

Answer 1

Answer:

cos^2

Step-by-step explanation:

sin = cos

=> 2tan^2 - sin^2 - 1

=> 2 (sin^2 / cos^2) - sin^2 - 1

=> 2 (sin^2 / sin^2) - sin^2 - 1

=> 2 ( 1 ) - sin^2 - 1

=> 2 - sin^2 - 1

=> 1 - sin^2

$sin^{2} + cos^{2} = 1 \\ 1 - \sin^{2} = cos^{2}$

=> cos^2