cos (20) = cos' 8 - sing cos (20) = 2:cos- 8 - 1 cos(20) =1 - 2 sin 9 Lan (28)= type your answer 3 If ain = dvd and O is in Quadrant Il, find Lan (28) tan (28) as type your answer... type your answer type your answer. 4 Feb IF 11:05 45 9 0Hall Angle Identities 4 sin ( ) = ty Find a, b, and c. Note that the fraction is not simplified. cos (=) = $1 tan ()=wind sin( ) type your answer. type your answer. type your answer 5 Find a, b, and c. Note that the fraction is not simplified. a+ vb COS 8 a type your answer.. type your anwver type your answerSum and Difference Identities 7 costa + 8) = cosa cos B # sin a sin B sin(a + 8) = sin a cos B + cosa sin 8 Use the sum and difference formulas to match each expression to It's simplified equivalent. Lan(a +: 0) = Expression 1) sin 30" . cos 45* + cos 30" . sin 45" Expression 2) cos 30" - cos 45" - sin 30' - sin 45" Expression 3) sin 45" . cos 120' - cos 45" - sin 120" Expression #) cos 210" - cos 60" + sin 210' . sin 60" Expression 1 cos( 1501 Expression sin(-759 Expression 3 sin(759 Expression 2n and Difference Identities B (a + 8) = cosa cos B # sin a sin B (a # #) = sina cos B + cosa sin B Fill In the blanks. Do not rationalize. Note: a