Question

Find the value of tan9 ° tan27 ° tan60 ° tan63 ° tan81
​

Answer 1

$\huge\underline\red{ANSWER}$

1. tan9 ° =0.15838444032
2. tan27 ° = 0.50952544949
3. tan60 ° =1.73205080757
4. tan63 ° =1.96261050551
5. tan81°=6.31375151468

Hope it helps...

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Answer 2

Answer:

Step-by-step explanation:

Explanation:

x

=

tan

81

+

tan

9

−

(

tan

63

+

tan

27

)

=

cot

9

+

tan

9

−

(

cot

27

+

tan

27

)

=

(

cos

9

)

2

+

(

sin

9

)

2

sin

9

⋅

cos

9

−

(

cos

27

)

2

+

(

sin

27

)

2

sin

27

⋅

cos

27

=

1

sin

9

⋅

cos

9

−

1

sin

27

⋅

cos

27

=

2

sin

18

−

2

sin

54

=

2

⋅

sin

54

−

sin

18

sin

54

⋅

sin

18

=

4

cos

36

⋅

sin

18

cos

36

⋅

sin

18

=

4