Math, asked by Lakshya3889, 3 months ago

If 3 cos θ = 5 sin θ , then the value of 5 sin θ - 2 sec³ θ + 2 cos θ/ 5 sin θ + 2 sec³ θ - 2 cos θ is

Answers

Answered by mitarth11
0

Answer:

1

Step-by-step explanation:

cosθ=5sinθ

cosθ=(  

3

5

)sinθ

cos  

2

θ=(  

3

5

)  

2

sin  

2

θ

1−sin  

2

θ=(  

9

25

)sin  

2

θ

⇒sin  

2

θ=  

34

9

 

∴sinθ=  

34

 

3

 

cos  

2

θ=1−sin  

2

θ=1−  

34

9

=  

34

25

 

∴cosθ=  

34

 

5

 

∴  

5sinθ−2sec  

3

θ+2cosθ

5sinθ−2sec  

3

θ+2cosθ

 

=  

5×  

34

 

3

−2×  

125

34  

34

 

+2×  

34

 

5

 

5×  

34

 

3

−2×  

125

34  

34

 

+2×  

34

 

5

 

 

=  

34

 

15

−2×  

125

34  

34

 

+  

34

 

10

 

34

 

15

−2×  

125

34  

34

 

+  

34

 

10

 

 

=  

34

 

25

−2×  

125

34  

34

 

 

34

 

25

−2×  

125

34  

34

 

 =1

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