Question

Find the value of root of 1+cos theta/1-cos thetha

Answer 1

Answer:

Step-by-step explanation:hwrhfuligkgkyugecgrugueo

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Answer 2

Answer:

Explanation:

√

(

1

−

cos

θ

)

(

1

+

cos

θ

)

Recall: (1-costheta)(1+costheta) is an example of the difference of 2 squares. The general form is

(

a

−

b

)

(

a

+

b

)

=

a

2

−

b

2

=

√

1

−

cos

2

θ

Recall:

sin

2

θ

+

cos

2

θ

=

1

so,

1

−

cos

2

θ

=

sin

2

θ

=

√

sin

2

θ

When you are square rooting a number, it can be positive or negative. Why?

Here's an example

2

2

=

4

and

(

−

2

)

2

=

4

If you square a negative or positive number, its result will always be positive unless its a complex number.

=

±

sin

θ