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Unformatted text preview: first three angles less than zero to have these sine values
(i) 0 (ii) 0.318 (iii) –0.741 8. Give the first three angles less than zero to have these cosine values
(i) 0 (ii) 0.647 (iii) –0.358 9. Estimate the smallest positive angle whose sine and cosine values are equal.
10. Using the estimate made in the previous question, list four positive and four negative
angles whose
(i) positive values
(ii) negative values
of the sine and cosine values for those angles are equal. © Frank Tapson 2004 [trolPT:27] Trigonometry T/32
B The area of any triangle is given by onehalf the product
of two adjacent edges and the angle between them.
Area of Triangle ABC = 1 ab sin C A 2 1.
2.
3.
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5.
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7.
8. Find the area of triangle ABC when 9.
10. a c
b C a = 8.4 cm
Find the area of triangle ABC when b = 5.9 cm b = 3.7cm
c = 7.2 cm A = 52º Find the area of triangle ABC when AB = 6.7 cm AC = 9.3 cm ∠ BAC = 55º Find the area of triangle ABC when BC = 3.1 cm AC = 5.4cm ∠ ACB = 37º Find the area of triangle ABC when AB = 14.5 cm BC = 9.6 cm ∠ ACB = 81º ∠ ABC = 58º Find the area of triangl...
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 Spring '14

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