Name class date Lesson 23-2 Lesson 23-3 26. Make sense of problems. In Item 25, you found the function y1 1 y2 in the form y 5 sin (x 1 c). Use the sum identity for sine to algebraically verify this identity. Make use of structure. Verify each identity. 31. sin (x 2 p) 5 2sin x 27. Make use of structure. Find the exact value. 15p a. sin 6 32. 12tan u tan a 5 b. tan (1058) 9 3 and tan b 52 with angle 10 5 a terminating in Quadrant I and angle b terminating in Quadrant II, what is the exact value of sin (a 1 b)? cos (u 1 a ) cos u cos a 28.\tGiven sin a 5 Attend to precision. Solve each equation on the interval [08, 3608]. 7 A. 5 33. sin 2u 2 cos u 5 0 31 B. 2 25 C. 2 D. 13 181 905 6 181 905 34.\tcos4 u 2 sin4 u 5 cos 2u 3 9 29.\tGiven sin A 5 and tan B 52 with A 5 10 terminating in Quadrant I and B terminating in Quadrant II, find the exact value of tan (A2B). 35. Determine the number of solutions on the interval 1 [0, 2p ) for cos (4u) 5 2 . 2 1 p with 0 < u < , find sin u, cos u, 6 2 sin 2u, and tan 2u. A.\t2 30.\tGiven cot 5 B.\t4 C.\t6 D.\t8 2015 College Board. All rights reserved. 4 SpringBoard Precalculus, Unit 4 Practice