Question
Simplify (cos20°+sin 20°)
/(cos20°-sin20°)Solution
(cos 20°+sin 20°) / (cos 20°-sin 20°) [(cos 20°+sin 20°)/cos 20°] / [(cos 20°-sin 20°)/cos 20°] = (1+tan 20°)/ (1-tan 20°)      Put tan 45° in place of 1. = (tan45°+tan 20°)/(1-tan 20°×tan 45°) Using the tangent addition formula:  tan(a+b) =(tanA+tanB)/ (1-tanA.tanB) =tan (45°+20°) =tan (65°)
More Trigonometry Questions
[490 of 7 - (13)2 of 5] - 1228 = ?
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3% of 3000 x ?% of 2000 = 3600
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(15 × 16) + 242= ? × 16
? = 80% of 30% of (50 × 150) + 400
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(15 - 19 + 10) ² + ? = 45 X 2 If √3n 729, then the value of n is equal to:
- Simplify the following expression:
(48% of 800 × 3) ÷ 6 + 440 ÷ √25 - 14² 3 √(432 – 13 + 9 × 32) = ?
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