In Exercises 23-30, solve algebraically for exact solutions in the interval [0,2pi). Use your grapher only to support your algebraic
work.
24. cos 2x + sin x = 0
23. cos 2x + cos. x = 0
25. cos .x + cos 3.x = 0
26. sin x + sin 3x = 0
In Exercises 31-36, use half-angle identities to find an exact value
without a calculator.
31. sin 15°
32. tan 1950
33. cos 75°
34. sin (5/12)
36. cos (w/8)
35. tan (7/12)

21.4 i did it already for s1

step-by-step explanation:

ruth is 6 years old

step-by-step explanation:

6 + 24 = 30,   so 6/30 = .2  

if you do 1/5 it also equals .2, so that is the answer.

answer: 1722

step-by-step explanation:

given: the mass of saturn=

the mass of mercury=

the number of times the mass of saturn is greater than the mass of mercury

hence, the mass of saturn is 1722 times greater than the mass of mercury.