Question: EXERCISES 6.2 1. Express as a single trigonometric function. 6. Fin (a) cos 2a cos a - sin 2a sin a (b) cos & cos

EXERCISES 6.2 1. Express as a single trigonometric function. 6. Fin (a) cos 2a cos a - sin 2a sin a (b) cos & cos 4x + sin x sin 4.r (a) (c) sin 5 cos 2 - cus 5 sin 2 ( b ) (d) sin 2m cos m + cos 2mm sin m (e) tan 2a + tan 3a tan 7 - tan 9 (c) 1 - tan 2a tan Ja (f) (g) cos* x - sin x 1 + tan 7 tan 9 (h) sin a cos a + cos a sin a (i) tan x + tan x I - tan' (j) cos# 2 + sin' 2 2. Evaluate using formulas developed in this section. B (a) sin 13TT 12 (b) cos 12 (c) tan --T (d) tan( - (e) sin 750 (f) cost --15") 10. 3. Find the value of each of the following (a) sin(# - (b) cos - " #) (c) tan - 31 2TT 3 4. If x and y are in the interval (0. ) and sin x = ; and cos y = 17. evaluate each of the following. (a) sin(.x - y) (b) cos(x + y) (c) lan(x + y ) 5. If x is in the interval (T ) and y is in the interval (T. and cos r = - and tan y = 4, evaluate each of the following. (a) sin(x + y) (b) cos(x - y) (c) tan(x - y') ANSWERS 6.2

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