cos(α) = sin(90° - α)
→ cos(16° + θ) = sin(90° - (16° + θ)) = sin(74° - θ)
→ sin(36° + θ) = cos(16° + θ)
→ sin((36° + θ) = sin(74° - θ)
→ 36° + θ = 74° - θ
→ 2θ = 38°
→ θ = 19°
→ θ = 19 °+ 180°n for n= 0, 1, 2, ...
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tan2(theta) + 5*tan(theta) = 0 => tan(theta)*[tan(theta) + 5] = 0=> tan(theta) = 0 or tan(theta) = -5If tan(theta) = 0 then tan(theta) + cot(theta) is not defined.If tan(theta) = -5 then tan(theta) + cot(theta) = -5 - 1/5 = -5.2
Cosine squared theta = 1 + Sine squared theta
2 sin(x) + 1 = 0 2 sin(x) = -1 sin(x) = -1/2 x = 210° and 330°
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The reciprocal of a number plus the reciprocal of twice the number equals Find the number. 1/2 find the number