Math, asked by meenaerku, 3 months ago


If 180°< theta< 270° and cos theta=-3/5,then tan
theta/
2​

Answers

Answered by Anonymous
0

Answer:

180

θ<270

⇒90

<

2

θ

<135

cos

2

θ=1−sin

2

θ=1−

25

9

=

25

16

180

<θ<270

cos

2

θ=

25

16

⇒cosθ=−

5

4

cos

2

2

θ

=

2

1+cosθ

=

2

1−4/5

=

10

1

90

<θ/2<135

cos

2

(θ/2)=

10

1

⇒cos(θ/2)=−

10

1

Answered By me

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