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Tan A = root 2 - …

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Tan A = root 2 - 1 , show that SinA ×CosA = root 2/4

    • Posted by Archi Jain 4 years, 7 months ago

    CBSE > Class 10 > Mathematics
    • 2 answers

    Sachin Yadav 4 years, 7 months ago

    Samajh mein aya bro

    1Thank You

    Sachin Yadav 4 years, 7 months ago

    TanA. = √2-1, tan*2A=(√2-1)*2,tan^2A=2+1-2√2, 1+tan^2A= 4-2√2, sec^2A= 4-2√2, cos^A= 1/4-2√2,. Cos^2A= 4+2√2/8,. Sin^2A= 1-cos^2A, sin^2A= 4-2√2/8,. Sin^2A×cos^2A= (4-2√2)×(4+2√2)/8×8. (SinAcosA)^2= 8/64,. (SinAcosA)^2= 2/16,. SinAcosA= √2/4 proved

    2Thank You

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