Trignometry - trigonomoetry 5

1

greatvishal swami ·Mar 14 '09 at 4:14

SL loney se hai kya

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tapanmast Vora ·Mar 14 '09 at 4:18

is thread me karna kya hai ?

do v hav to guess the book or WAT?

or yeh cot vala kuch PROVE karna hai ya aisa kuch

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39

Dr.House ·Mar 14 '09 at 4:21

ANSWER THE QUESTIONS!

@vishal bhaiyan: no its not from loney

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21

tapanmast Vora ·Mar 14 '09 at 4:24

wat is da questn here?

JEE mein to options bhi hote hai. they also tell u wat do u hav to do wid the data given!!!

mathie kuch editing karo yaar

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39

Dr.House ·Mar 14 '09 at 4:25

chalo just try to anser them.

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1

greatvishal swami ·Mar 14 '09 at 4:26

tapan take it easy yaar pehle jee subjective tha tabhi ye Q aaya hoga

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21

tapanmast Vora ·Mar 14 '09 at 4:26

DO I HAV TO PROVE THIS?

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tapanmast Vora ·Mar 14 '09 at 4:26

Or lyk was it a true/false

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1

krish1092 ·Mar 14 '09 at 6:47

$\text{Consider LHS} \\ 1-cot23=1-tan67 \\ \Longrightarrow 1-tan67=1-tan(45+22) \\ \Longrightarrow 1-(\frac{tan45+tan22}{1-tan45tan22}) \\ = \frac{1-tan22-1-tan22}{1-tan22} \\ = \frac{-2tan22}{1-tan22} \\ = \frac{2tan22}{tan22-1} \\ \text{Divide numerator and denominator by tan22} \\ = \frac{2}{1-cot22}$

PS:Source of this question is Titu Andreescu!

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39

Dr.House ·Mar 14 '09 at 7:07

yup right. its from 103 problems in trigonometry. the second one came in iit direct.

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