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5.1 Using Fundamental Identities Fundamental Trigonometric Identities 1 sin u csc u 1 csc u sin u 1 cos u sec u 1 sec u cos u 1 tan u cot u 1 cot u tan u Fundamental Trigonometric Identities sin u tan u cos u sin u cos u 1 2 2 1 tan u sec u 2 cos u cot u sin u 2 1 cot 2 u csc 2 u Co functions sin u cos u; cos u sin u 2 2 tan u cot u; cot u tan u 2 2 sec u csc u; csc u sec u 2 2 Even or Odd functions Odd Even sin u sin u cos( u ) cos u csc( u ) csc u sec( u ) sec u Odd tan( u ) tan u cot( u ) cot u Simplify the Trigonometric Identity Given: cos 2 y 1 sin y Simplify the Trigonometric Identity Given: cos 2 y 1 sin y cos 2 y 1 sin y 1 sin y 1 sin y Simplify the Trigonometric Identity Given: cos 2 y 1 sin y cos 2 y 1 sin y 1 sin y 1 sin y cos 2 y 1 sin y 1 sin 2 y Simplify the Trigonometric Identity Given: cos 2 y 1 sin y cos 2 y 1 sin y 1 sin y 1 sin y cos 2 y 1 sin y 1 sin 2 y cos 2 y sin 2 y 1 cos 2 y 1 sin 2 y Simplify the Trigonometric Identity Given: cos 2 y 1 sin y cos 2 y 1 sin y 1 sin y 1 sin y cos 2 y 1 sin y 1 sin 2 y cos 2 y 1 sin y 1 sin y 2 cos y Simplify the Trigonometric Identity Given: sec 2 x 1 sec x 1 Simplify the Trigonometric Identity Given: sec x 1 sec x 1 2 sec x 1sec x 1 sec x 1 Simplify the Trigonometric Identity Given: sec 2 x 1 sec x 1 sec x 1sec x 1 sec x 1 sec x 1 Evaluate the function Find the six function values Given: sec 3 ; csc 3 5 2 Find Sin Cos Tan Cot 5 Evaluate the function Find the six function values Given: sec 32 ; csc 35 5 Find Sin 2 3 Cos 5 3 Tan Cot 2 3 5 5 2 3 2 5 5 Simplify a Trigonometric expression Given: Sin Csc Sin Simplify a Trigonometric expression Given: Sin Csc Sin 1 Sin 2 Sin Sin Sin Simplify a Trigonometric expression Given: Sin Csc Sin 1 Sin 2 Sin Sin Sin 1 Sin 2 Sin Sin Cos 2 Cos 2 Sin Sin Using Substitution Csc 3 x Csc 2 x Cscx 1 Substitute u Cscx u3 u2 u 1 u 2 u 1 1u 1 u 2 1 u 1 Csc 2 x 1 Cscx 1 Cscx 1Cscx 12 or Cot 2 xCscx 1 Using Substitution 2 2 16 4 x 2 ; x 2 cos 16 42 cos 2 16 4(4 cos 2 ) 16 16 cos 2 16 1 cos 2 4 Sin 2 4 Sin 2 2 4 Sin 2 2 2 Sin 4 2 Using Substitution 2 2 16 4 x 2 ; x 2 cos 2 2 1 Cos 2 2 16 42 cos 2 16 4(4 cos 2 ) 16 16 cos 2 16 1 cos 2 1 Cos 1 2 2 4 Sin 2 4 Sin 2 2 4 Sin Cos 2 1 2 2 2 2 Sin 4 2 Cos 2 2 Homework Page 359-361 # 1, 17, 27, 37, 47, 53, 57, 65, 77, 87, 93, 107 Homework Page 359-361 # 10, 26, 36, 48, 54, 58, 68, 78, 88, 94, 120