Section 8.2 Sine and Cosine Functions - Section 8.2 Sine and Cosine Functions On the Unit Circle the radius is 1 Ex1 Evaluate sin and cos for the

# Section 8.2 Sine and Cosine Functions - Section 8.2 Sine...

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Section 8.2 Sine and Cosine Functions On the Unit Circle, the radius is 1. Ex1) Evaluate sin θ and cos θ for the following values of θ : a)0 b) 2 c) π d) 3 2
Ex2) Evaluate the following:a)sin6and cos6b) sin3and cosEx3) Evaluate the following:a)2sin3and 2cos3b) 3sin4and 3cosEx4) Evaluate the following: 3 4
Ex5) How long a ladder is needed to reach a roof 20 feet above the ground if the ladder makes a 60 degree angle with the ground? (Round to 2 decimal places)
Ex6) Sketch each graph: a) ( ) 3sin 2 f t t b) ( ) 2cos4 f t t  
Try) Sketch each graph:a)( )4sinf ttb) ( )3cos6f tt Ex7) A travel agency specializing in Caribbean vacations models its daily revenue (in dollars) on day n of the year by the function2( )600500cos365nR n. Find the company’s revenue on March 1 (day n = 60).
Ex8) Use the sum and difference identity to find the following. (No calculator).a) 5sin12b) 7cos 12