ans

000095
(1) A (2) C

000096
(1) $-2$; (2) 二; (3) $-\dfrac{4\sqrt{5}}{9}$

000097
$\sqrt{2}$

000099
(1) $\sin\theta$; (2) $0$

000100
$\dfrac{2}{3}$

000102
(1) 证明略; (2) 证明略

000103
(1) $\dfrac{\pi}{4}$; (2) $1$

000104
证明略

000105
(1) C; (2) D

000106
(1) $\dfrac{2\pi}{3}$; (2) $-\dfrac{\sqrt{5}}{5}$

000108
$\dfrac{1}{3}$

000109
$-\dfrac{\pi}{4}$

000110
证明略

000111
$-\sqrt{2}$

000114
证明略