Answer:
what do you mean?
Step-by-step explanation:
Sin(2θ)+sin(<span>θ)=0
use double angle formula: sin(2</span>θ)=2sin(θ)cos(<span>θ).
=>
2sin(</span>θ)cos(θ)+sin(<span>θ)=0
factor out sin(</span><span>θ)
sin(</span>θ)(2cos(<span>θ)+1)=0
by the zero product property,
sin(</span>θ)=0 ...........(a) or
(2cos(<span>θ)+1)=0.....(b)
Solution to (a): </span>θ=k(π<span>)
solution to (b): </span>θ=(2k+1)(π)+/-(π<span>)/3
for k=integer
For [0,2</span>π<span>), this translates to:
{0, 2</span>π/3,π,4π/3}
Answer:
Jamal's age = 2×x+12= 2x+12
sum og ages = 45
2x+12+x= 45
=3x+12=45
=45-12= 3x
= 32=3x
x= 32/3= 10.67
2x+13 =21.34+12= 33.34
hope.ot helps
plz mark as brainliest
