જો $a\,{\cos ^3}\alpha + 3a\,\cos \alpha \,{\sin ^2}\alpha = m$ અને $a\,{\sin ^3}\alpha + 3a\,{\cos ^2}\alpha \sin \alpha = n,$ તો ${(m + n)^{2/3}} + {(m - n)^{2/3}} = . . .$
$2{a^2}$
$2{a^{1/3}}$
$2{a^{2/3}}$
$2{a^3}$
જો $\tan \theta = \frac{{ - 4}}{3},$ તો $\sin \theta = $
આપેલ પૈકી ક્યૂ સત્ય છે ?
${\sin ^2}{5^o} + {\sin ^2}{10^o} + {\sin ^2}{15^o} + ... + $ ${\sin ^2}{85^o} + {\sin ^2}{90^o} = . ..$
$6({\sin ^6}\theta + {\cos ^6}\theta ) - 9({\sin ^4}\theta + {\cos ^4}\theta ) + 4 = . . . $
જો $\frac{{3\pi }}{4} < \alpha < \pi ,$ તો $\sqrt {{\rm{cose}}{{\rm{c}}^2}\alpha + 2\cot \alpha } = . . .$