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May 7th, 2017, 02:10 AM   #1
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Solve the Triangles

Solve below step by step

1) In ∆ABC, if A+B+C = 180°,
show that tanA + tanB + tanC = tanA . tanB . tanC

2) An arc subtends an angle of 70° at the center of a circle and its length is 132 mm. Find the radius of the circle.

3) Find radius of circle when the sides of triangles are all equal.

4) How far a boy on bicycle travel in 5 revolution if the diameter of the wheels of his bicycle each equal to 50cm?

5) A belt 24.75meter long passes around a 1.5cm diameter pulley. As the belt make two complete revolution in a minute, how many radians does the wheel turn in one second?

Last edited by skipjack; May 7th, 2017 at 09:34 AM.
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May 7th, 2017, 03:07 AM   #2
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Do you just want someone to do your homework for you? How about trying to do these yourself and posting your attempts. That way we will have an idea what you do understand about these and what hints will help you.
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May 7th, 2017, 09:32 AM   #3
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(1) Proved here.

(3) The question doesn't explain how the triangles are related to the circle.
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