Question

Let ( sin 2 alpha=x )
( =(1+x)left(1+frac{4}{x^{2}}+frac{4}{x}right)=49+frac{4}{x^{2}}-frac{28}{x} )
( = ) ) ( (1+x)left(x^{2}+4 x+4right)=49 x^{2}-28 x+4 )
( = ) ) ( x^{3}-44 x^{2}+36 x=0 quad x=sin 2 alpha eq 0 )
( = ) ) ( xleft(x^{2}-44 x+36right)=0 )
( frac{x^{2}-44 x+36-0}{x}=x=sin 2 alpha )

# 3. tall 20 14. If 0 < a < and 4. The valu sina + cosa + tana + cota + seca + coseca = 7 then than sin 2a is a root of x2 - 44x - 36 = 0 5. If tan(A then Ki thoni

Solution