What is expand (2sin(x)-1)(sin(x)+1) ?

The solution to expand (2sin(x)-1)(sin(x)+1) is sin(x)-cos(2x)

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expand (2sin(x)-1)(sin(x)+1)

expand

(2 sin (x) - 1) (sin (x) + 1)

sin (x) - cos (2 x)

Solution steps

(2 sin (x) - 1) (sin (x) + 1)

Apply FOIL method

(2 sin (x) - 1) (sin (x) + 1) : sin (x) - cos (2 x)

= sin (x) - cos (2 x)

- 2 (- 2^{\frac{N}{2}} + 1)

cos (\frac{3 π}{4} - \frac{5 π}{4})

sin^{3} (2 x) (5 x + 3)^{7}

\frac{x}{( x + 1 ) ( x ^{2} + 4 )}

\frac{1}{( s - y ) ^{2}}

What is expand (2sin(x)-1)(sin(x)+1) ?
The solution to expand (2sin(x)-1)(sin(x)+1) is sin(x)-cos(2x)