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Prove that i) Tan69° + tan66° …

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Prove that i) Tan69° + tan66° + 1 = tan69° + tan66° ii) tan 13A - tan 9A - tan 4A = tan 13A tan 9A tan 4A

    • Posted by Mayank Yadav 5 years, 9 months ago

    CBSE > Class 11 > Mathematics
    • 2 answers

    Sadhu Meher 5 years, 9 months ago

    ii)tan13A-tan9A-tan4A=tan13A tan9A tan4A L.h.s Tan13A=tan(9A+4A) Tan13A=tan9A+tan4A/1-tan9A .tan4A Tan13A(1-tan9A tan4A)=tan9A+ tan4A Tan13A-tan13Atan9 Atan4A=tan9A+ tan4A Tan13A- tan9 A-tan4A=tan13 Atan9A tan4A L.h .s= R.h.s (Prove)

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    Techno Burst 5 years, 9 months ago

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