Question

solve for θ in the following equation:Sin 2θ=cosθ

Answer 1

^^

Answer 2

I'll help you quickly this:

Answer 3

no3 question haha thank u

Answer 4

You should have a formula for sin(2.theta)

\[\sin(2\theta) = 2 \sin \theta . \cos \theta\]

Answer 5

Hence if sin(2.theta) = cos(theta), that implies .... what? Simplify the expression.

Answer 6

u said before 1 right?

Answer 7

?

Answer 8

w8

Answer 9

if i simply it with my poor brain i think they are the same?

Answer 10

Sin 2θ=cosθ
=> 2 sin θ . cosθ = cosθ
=> 2 sin θ = 1
=> sin θ = 1/2

Answer 11

Now you just have to say for what values of θ is sin θ = 1/2

Answer 12

1/2

Answer 13

What is sin(30) and sin(60)?

Answer 14

sin(30)

Answer 15

(You should learn by heart the sin, cos and tan all these angles
0, 30, 45, 60, 90.)

Answer 16

What is the value of sin(30 degrees)?

Answer 17

1/2

Answer 18

right. Now are there other θ for which sin θ = 1/2. Yes. So you need to write them all down.

Answer 19

ok