Question Number 76270 by Master last updated on 25/Dec/19
Commented by Master last updated on 25/Dec/19
$$\left.\mathrm{A}\left.\right)\:\mathrm{sin6}°+\mathrm{cos6}°\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\mathrm{B}\right)\mathrm{sin12}°+\mathrm{cos12}° \\ $$$$\left.\mathrm{C}\left.\right)\mathrm{sin18}°+\mathrm{cos18}°\:\:\:\:\:\:\:\:\:\:\:\mathrm{D}\right)\mathrm{sin24}°+\mathrm{cos24}° \\ $$
Commented by MJS last updated on 25/Dec/19
$$\mathrm{sin}\:\mathrm{12}°\:\approx.\mathrm{208} \\ $$$$\mathrm{cos}\:\mathrm{12}°\:\approx.\mathrm{978} \\ $$$$\Rightarrow\:\mathrm{the}\:\mathrm{given}\:\mathrm{term}\:\mathrm{has}\:\mathrm{a}\:\mathrm{value}\:\mathrm{of}\:\approx−\mathrm{26}.\mathrm{3} \\ $$$$\Rightarrow\:\mathrm{none}\:\mathrm{of}\:\mathrm{the}\:\mathrm{answers}\:{A},\:{B},\:{C},\:{D}\:\mathrm{can}\:\mathrm{be} \\ $$$$\mathrm{right} \\ $$
Commented by Master last updated on 25/Dec/19
$$\mathrm{mind}\:\mathrm{is}\:\mathrm{power}\:\mathrm{sir} \\ $$
Commented by MJS last updated on 26/Dec/19
$$\mathrm{nobody}\:\mathrm{can}\:\mathrm{change}\:\mathrm{facts} \\ $$
Commented by Master last updated on 26/Dec/19
