Test 4 Solutions

Test 4 Solutions - Test 4 Name: ______________________ Math...

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Unformatted text preview: Test 4 Name: ______________________ Math 115-007 November 19, 2009 1. (18 points) Given sin() = 4 1 (with in Quadrant I), find the following using the appropriate double-angle or half-angle formula: cos( ) = 4 15 cos( 2 ) = 8 7 sin( 2 ) = 4 1 4 15 2 sin( 2 ) = 2 4 15 1- cos( 2 ) = 2 4 15 1 + tan( 2 ) = 4 15 1 4 15 1 +- 2. (3 points each) Find the following trigonometric values using half-angle or sum- and difference-identities. a. sin( 8 ) = 2 2 2 1 2 4 cos 1- = - b. tan( 12 7 ) = - + -- = + - 2 3 1 2 3 1 6 7 cos 1 6 7 cos 1 c. cos( o 175 ) = ) 45 sin( ) 120 sin( ) 45 cos( ) 120 cos( ) 45 120 cos( o o o o o o- = + 2 2 2 1 2 2 2 3-- = d. tan( o 15 ) = ) 45 tan( ) 60 tan( 1 ) 45 tan( ) 60 tan( ) 45 60 tan( o o o o o o +- =- ( 29 ( 29 1 3 1 1 3 +- = Test 4 Name: ______________________...
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This note was uploaded on 03/04/2012 for the course MATH 115 taught by Professor Ms.park during the Fall '09 term at South Carolina.

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Test 4 Solutions - Test 4 Name: ______________________ Math...

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