Question

tan70° = tan 20° + 2 tan 50°

Answer 1

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$\blacksquare$ Trigonometric Values :

• tan70° = 1.22
• tan20° = 2.23
• tan50° = -0.27

$\implies$ tan70° = tan20° + 2tan50°

$\implies$ 1.22 = 2.23 + (2 × -0.27)

$\implies$ 1.22 = 2.23 - 0.54

$\large\implies \boxed{1.22 \ne 1.69}$

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