180 likes | 734 Views
LG 4-3 Evaluating Trigonometric Functions. SIN E. COS INE. TAN GENT. SOH CAH TOA. hypotenuse. opposite. hyp. opp. adjacent. adj. S ome. SOH CAH TOA. O ld. H ippie. C ame. A. H oppin’. T hrough. O ur. A partment. Old Hippie. S in. SOH CAH TOA. O pp. H yp. C os. A dj.
E N D
LG 4-3 Evaluating Trigonometric Functions SINE COSINE TANGENT
SOHCAHTOA hypotenuse opposite hyp opp adjacent adj
Some SOHCAHTOA Old Hippie Came A Hoppin’ Through Our Apartment Old Hippie
Sin SOHCAHTOA Opp Hyp Cos Adj Hyp Tan Opp Adj Old Hippie
SOHCAHTOA csc sec cot CHOSHACAO ??
SOHCAHTOA for the Unit Circle Reciprocal =
Find the values of sin 45°, cos 45°, and tan 45° WE DO NOT Use a Calculator From the unit circle sin 45° cos 45º tan 45°
Find sin, cos, tan of 60°;sin, cos, tan of 30° From the unit circle sin 60° sin 30° cos 60° cos 30° tan 60° tan 30°
You try • Find the exact value of • Without using a calculator, evaluate the six trigonometric functions for an angle of 180°.
More examples: • Find the exact value of • Without using a calculator, evaluate the six trigonometric functions for an angle of 180°. • Without using a calculator, evaluate the six trigonometric functions for an angle of 120°.
What about angles not on UC? • Find the cosine function for an angle in standard position whose terminal side passes through the point (-5,12). • How do you know it is NOT on UC?
Another Example (test question!): • Find the six trigonometric functions of Θ if Θ terminates in Quadrant III and
Ticket out the Door • Find exact values (no decimals) of the six trigonometric functions of 300°.
Homework: • BLOG • Quiz Tomorrow on Unit Circle (think problems from the worksheet!) • (degrees, radians and coordinates) • No trig ratio stuff yet • UNIT TEST IS SEPTEMBER 30th