Answer Key
809
dy dx =
x sec x tan x −sec x x 2
179 .
dy dx = (1−sin dy dx = 2csc
x )(1−sin x )−cos x ( x +cos x )
181 .
2 x (1+cot x ) 2
183 .
185 . y =− x
187 . y = x + 2−3 π 2
189 . y =− x
191 . 3cos x − x sin x 193 . 1 2 sin x 195 . 2csc x ⎛
⎝ csc 2 x +cot 2 x ⎞ ⎠
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