If tan 4theta = cot(theta – 10°), where 4theta and(theta – 10°) are acute angles then the value of theta in degrees is
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We have given
sin5θ=cos4θ
⇒sin5θ=sin(90−4θ)
⇒5θ=90−4θ
⇒9θ=90
∴θ=10
Hence, the value of θ is 10
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