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If tan a = 2 root …

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If tan a = 2 root 2 then the value of Cos A minus sin a upon Cos A + sin a is

    • Posted by Sanskriti Jais 4 years, 3 months ago

    CBSE > Class 10 > Mathematics
    • 1 answers

    Piyush Kr.?? 4 years, 3 months ago

    Let a triangle ABC in which right angled at B and angle A is equal to theta degree.... Now tan a is equal to 2 root 2 and so, tan a is equal to BC/AB=2√2 ==>BC=2√2AB. Now let AB=X.Then BC =2√2X. By usuing Pythagoras theorem we have AC squire = AB square + BC square..==>AC=3X. Now (cosA-sinA)/(cosA+sinA)=-1

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