What is expand (cos(b)-1)(sin(b)-1) ?

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

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expand (cos(b)-1)(sin(b)-1)

expand

(cos (b) - 1) (sin (b) - 1)

cos (b) sin (b) - cos (b) - sin (b) + 1

Solution steps

(cos (b) - 1) (sin (b) - 1)

Apply FOIL method

(cos (b) - 1) (sin (b) - 1) : cos (b) sin (b) - cos (b) - sin (b) + 1

= cos (b) sin (b) - cos (b) - sin (b) + 1

(7 + x)^{2}

(ln (t) + 1)^{2}

ln (8 t)

(x - 3)^{2}

(1 + cot (x))^{2}

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