Ho Yong Kian's answer to Ng zhi xian's Secondary 3 E Maths question.
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Ai) you have to find angle CBA before using cosine rule
ii) use sine rule
iii) find the angle in the triangle first
iv) use the sine rule for area of triangle
B)the cominality shared by the 2 triangles formed by viewing from a and b is the height of the balloon bc. Find that and you have your ans.
ii) use sine rule
iii) find the angle in the triangle first
iv) use the sine rule for area of triangle
B)the cominality shared by the 2 triangles formed by viewing from a and b is the height of the balloon bc. Find that and you have your ans.
Date Posted:
7 years ago
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