(sinA-cosA)square +(cosA-sinA)square
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4 sinAcosA
Step-by-step explanation:
=(sinA-cosA)square+(cosA-sinA)square
=(sinsquareA+2sinAcosA-cossquareA)+(cossquareA+2cosAsinA-sinsquareA)
=sinsquareA+2sinAcosA-cossquareA+cossquareA+2cosAsinA-sinsquareA
=2sinAcosA+2 cosAsinA
=4sinAcosA
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