What are the reasons?
1 answer:
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Making use of the following identities
sin 2x = 2 sin x cos x
cos 2x = 2 cos^2x - 1
we can write:
Equation (1) can be factorized to give, on the right hand side:
2 cos x(sin x - cos x) + 1
sin 2x = 2 sin x cos x
cos 2x = 2 cos^2x - 1
we can write:
Equation (1) can be factorized to give, on the right hand side:
2 cos x(sin x - cos x) + 1
