Advance functions 9 to 15 the right answer

Question 9 (1 point) Question 12 (1 point) The number of solutions to a linear What double angle formula can be trigonometric equation with no specified appropriately used to derive algebraically domain is a formula for sin ? ? O al o ( a) sin 20= 2 sin Ocos & (b) 1 ( b) cos 20= 1- 2 sin- @ O c) 2 ( c) cos(a + b) = cosa cosb - sin b sina ( d) cos 20= cos' e- sin' e O d) infinite " cos 28= cos" &- sin & Question 13 (1 point) Question 14 (1 point) Question 10 (1 point) Determine the value of a in the ( How many solutions does the equation A valid solution set for the equation tan q 25 cos x = 16 have where 0 Sx S 2x? - - 3 for the domain 0 Sx $2x is cos 20+ sin @= cos-0+ 30-6. O a) 2x O a) 6 O a) 1 O b) ; O b) 2 O b) a O c) 3 O ch cos 20 O d) 4 O d) 2 Question 11 (1 point) One approximate solution to the equation Question 15 (1 point) 5sin x - 2 = 2sin x for the domain = Sx $ 2 How many solutions does the equation sin 2x = sec x have for 0 S x S 2x? is ( a) 3 a) 41.5 O b) 4 ( b) 0.73 O c1 5 O c) 2.4 O d) 6 O d) 138.5