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Unformatted text preview: x ) + sin( x )tan( x ) to one trigonometric function. 4. Let be an angle such that cot( ) =3 and cos( ) < 0. (a) Which quadrant does lie in? (b) Is csc( ) positive or negative? (c) Use a fundamental identity to Fnd the exact value of csc( ). (d) Use a fundamental identity to Fnd the exact value of sin( ). 5. ind the exact value of sin ( + 4 ) if sin( ) = 3 5 and cos( ) = 4 5 . ( Hint : sin ( 4 ) = 1 2 and cos ( 4 ) = 1 2 ) 6. Let be an angle such that < < 3 2 and cos( ) =. 58. (a) Which quadrant does / 2 lie in? (b) Find the exact value of cos( / 2). (c) Find the exact value of sin( / 2). 7. Verify that sin( x )cos( x ) sin( x )cos( x ) = sec( x )csc( x ) . 15...
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 Fall '08
 KWON
 Math

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