## anonymous 5 years ago Find the exact value of the following: a) sin^2 (75^0) / sin45^0 cos^2 (30^0) b) tan(135^0) + sin30^0 x cot120^0

$a=[\sin(30+45)]/[\sin45\times \cos^230]$ $=[\sin30 \cos45 +\cos30 \sin45]^2/[\sin45\times \cos^230]$ then just plug in the numbers b tan(135)=tan(90+45)$=\sin(90+45)/\cos(90+45)$ cot(120)=cot(90+30) try to use this hint to find the answer