Question

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Answer 1

Answer:

tan 6θ = √3 = 1.732 OR tan6θ = 54 = 1.37

Explanation:

cos9θ = sinθ, 9θ<90

sin[90-9θ] = sinθ

90-9θ = θ

90 = 10θ

θ = 9. [But We'll take θ = 10, you'll know why]

θ = 10

tan6θ = tan60

tan60 = √3

Therefore tan6θ = √3 = 1.732

[If θ = 9, then tan6θ = 54] But tan^-1(54) is not in the option.

Also tan^-1(54) = 1.37

Answer 2

Hey mate this question is seems to be in place of tan 6 there should be tan5 ,if it is so your answer is in the given attachment

HOPE IT IS HELPFUL