Let ABC be a triangle with an interior point Q. Prove that the following two statements are equivalent: (a) ZQCB=LQAC and ZQBC = ZQAB. (b) BQ.AC CQ.AB and ZBQC + ZBAC = 180º. =

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A: Follow the procedure given below.

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A: According to the guidelines, we are answering first question. Please repost the remaining.…

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A: The answers are given below:

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A: This question is based on Trigonometric formula. Cos(a+b) = Cosa*Cosb - Sina*Sinb

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A: In this question we have to find the angle and sides of triangle.

Q: 5) Find c, b and B 42° A b B a=6 70° C

A: