4.3 Right Triangle Trigonometry Pg. 484 # 6-16 (even), 22-34 (even), 54-60 (even) –Use right triangles to evaluate trigonometric functions –Find function

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<ul><li><p>4.3 </p><p> Right Triangle Trigonometry</p><p>Pg. 484 # 6-16 (even), 22-34 (even), 54-60 (even)</p><p>Use right triangles to evaluate trigonometric functions</p><p>Find function values for 30 degrees, 45 degrees &amp; 60 degrees. Otherwise known as, in radians.</p><p>Use equal cofunctions of complements</p><p>Use right triangle trig. to solve applied problems</p></li><li><p>These relationships holds true for ALL right triangles</p></li><li><p>Given this right triangle</p><p>Find the value of all six trig. functions of . Make sure each value is in simplified form.</p></li><li><p>All 45o - 45o - 90o triangles on a unit All 30o - 60o - 90o triangles on a unit circle have these side lengths: circle have these side lengths: Special Triangles</p></li><li><p>Using the figures only, find the following values:tan 30o</p><p>cos 60o</p><p>sin 45o</p><p>sec 60o</p><p>cot 45o</p><p>sin</p><p>csc </p></li><li><p>Cofunction IdentitiesTrig identities showing the relationship between sine and cosine, tangent and cotangent, and secant and cosecant. The value of a trig function of an angle equals the value of the cofunction of the complement of the angle.Find a cofunction with the same value as the given expression.9. sin 46o 10. cot OR</p><p>Cofunction Identities, radiansCofunction Identities, degrees sin (90 x) = cos xcos (90 x) = sin x tan (90 x) = cot xcot (90 x) = tan x sec (90 x) = csc xcsc (90 x) = sec x</p></li><li><p>11. The distance across a lake (a) is unknown. To find the distance, a surveyor took the measurements shown in the figure. What is the distance across the lake?12. A flagpole that is 14 meters tall casts a shadow 10 meters long. Find the angle of elevation of the sun to the nearest degree.</p></li><li><p>Angles of Elevation: Angles of Depression:Rotate from a horizontal UP Rotate from a horizontal DOWN</p></li></ul>