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Question Number 89599 by 20000193 last updated on 18/Apr/20

Commented by john santu last updated on 18/Apr/20

4a) tan (A+C) =((tan A+tan C)/(1−tan A.tan C))   case (1) = (((1/(√3)) + (√3))/(1−(1/(√3)).(√3))) = ∞ (undefined )  case (2) = (((1/(√3)) − (√3))/(1+(1/(√3)).(√3))) = ((−2)/(2(√3))) = −(1/(√3))  case (3) = (((1/(√3))+(√3))/(1+(1/(√3)).(√3))) = (4/(2(√3))) = (2/(√3))  case (4) = case (1) undefined

$$\left.\mathrm{4}{a}\right)\:\mathrm{tan}\:\left({A}+{C}\right)\:=\frac{\mathrm{tan}\:{A}+\mathrm{tan}\:{C}}{\mathrm{1}−\mathrm{tan}\:{A}.\mathrm{tan}\:{C}} \\ $$$$\:{case}\:\left(\mathrm{1}\right)\:=\:\frac{\frac{\mathrm{1}}{\sqrt{\mathrm{3}}}\:+\:\sqrt{\mathrm{3}}}{\mathrm{1}−\frac{\mathrm{1}}{\sqrt{\mathrm{3}}}.\sqrt{\mathrm{3}}}\:=\:\infty\:\left({undefined}\:\right) \\ $$$${case}\:\left(\mathrm{2}\right)\:=\:\frac{\frac{\mathrm{1}}{\sqrt{\mathrm{3}}}\:−\:\sqrt{\mathrm{3}}}{\mathrm{1}+\frac{\mathrm{1}}{\sqrt{\mathrm{3}}}.\sqrt{\mathrm{3}}}\:=\:\frac{−\mathrm{2}}{\mathrm{2}\sqrt{\mathrm{3}}}\:=\:−\frac{\mathrm{1}}{\sqrt{\mathrm{3}}} \\ $$$${case}\:\left(\mathrm{3}\right)\:=\:\frac{\frac{\mathrm{1}}{\sqrt{\mathrm{3}}}+\sqrt{\mathrm{3}}}{\mathrm{1}+\frac{\mathrm{1}}{\sqrt{\mathrm{3}}}.\sqrt{\mathrm{3}}}\:=\:\frac{\mathrm{4}}{\mathrm{2}\sqrt{\mathrm{3}}}\:=\:\frac{\mathrm{2}}{\sqrt{\mathrm{3}}} \\ $$$${case}\:\left(\mathrm{4}\right)\:=\:{case}\:\left(\mathrm{1}\right)\:{undefined} \\ $$

Commented by mr W last updated on 18/Apr/20

to 20000193:  please don′t misuse this platform to  let other people do home work for you!

$${to}\:\mathrm{20000193}: \\ $$$${please}\:{don}'{t}\:{misuse}\:{this}\:{platform}\:{to} \\ $$$${let}\:{other}\:{people}\:{do}\:{home}\:{work}\:{for}\:{you}! \\ $$

Commented by mr W last updated on 18/Apr/20

i think we should not remunerate  people who just copy and throw their  home work here, even don′t make the  effort to type where he or she has  problem,but expect that somebody will  do all the things for him or her.    this forum helps people who try to  help themselves!

$${i}\:{think}\:{we}\:{should}\:{not}\:{remunerate} \\ $$$${people}\:{who}\:{just}\:{copy}\:{and}\:{throw}\:{their} \\ $$$${home}\:{work}\:{here},\:{even}\:{don}'{t}\:{make}\:{the} \\ $$$${effort}\:{to}\:{type}\:{where}\:{he}\:{or}\:{she}\:{has} \\ $$$${problem},{but}\:{expect}\:{that}\:{somebody}\:{will} \\ $$$${do}\:{all}\:{the}\:{things}\:{for}\:{him}\:{or}\:{her}. \\ $$$$ \\ $$$${this}\:{forum}\:{helps}\:{people}\:{who}\:{try}\:{to} \\ $$$${help}\:{themselves}! \\ $$

Commented by john santu last updated on 18/Apr/20

i′m sorry sir.

$${i}'{m}\:{sorry}\:{sir}.\: \\ $$

Commented by mr W last updated on 18/Apr/20

never mind sir! it′s just my opinion.

$${never}\:{mind}\:{sir}!\:{it}'{s}\:{just}\:{my}\:{opinion}. \\ $$

Commented by Kunal12588 last updated on 18/Apr/20

I just want to know does engineering maths  is of this level ?

$${I}\:{just}\:{want}\:{to}\:{know}\:{does}\:{engineering}\:{maths} \\ $$$${is}\:{of}\:{this}\:{level}\:? \\ $$

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