The value of 2tan-1 1/4
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Answer:
=1/2 ÷ 17/16
Step-by-step explanation:
sin (2tan - 1 1÷4) = sin20
writing sin20 in term of tanθ
= 2tanθ ÷ 1 + tan²θ
= 2 × 1/4 ÷ 1 + (1/4)²
= 1/2 ÷ 1 + 1/16
= 1/2 ÷ 16+1/16
= 1/2 ÷ 17/16
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