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1.5 Trigonometry

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Question 68

In triangle ABCABCABC, side AB AB\,AB has length 6 cm, side AC AC\,AC has length 10 cm and ∠BAC=θ\angle BAC = \theta∠BAC=θ, where θ \theta\,θ is measured in degrees. The area of triangle ABC ABC\,ABC is 18 cm2

a.

Find the two possible values of sin⁡θ\sin \thetasinθ.

[4]
b.

Given that BC BC\,BC is the longest side of the triangle, find the exact length of BCBCBC.

[4]

1.5 Trigonometry Questions

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