Question

Solve: SinACosA-SinA-CosA+1=0​

Answer 1

$\huge\mathcal{{\color{b}{✿Question✿}}}$

solve : sin A cos A – sin A – cos A + 1 = 0

$\huge \rm \red{\underline{✧solution✧}}$

∴ sin A cos A – sin A – cos A + 1 = 0

∴ sin A cos A – cos A = sin A – 1

∴ (sin A – 1) cos A – (sin A – 1) = 0

∴ (sin A – 1) = 0 and cos A = 1

∴ sin A = 1 and cos A = 1

∴ sin A = sin 1° and cos A = cos 0°

∴ A = 90° and A = 0°

$\red{\rule{45pt}{7pt}}\green{\rule{45pt}{7pt}}\orange{\rule{45pt}{7pt}}\blue{\rule{45pt}{7pt}}$