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4 years ago

Help Please !!!! Very Confused, do not understand how to complete these 2 questions properly.

Mathematics

1 answer:

Varvara68 [4.7K]4 years ago

8 0

Answer:

11) tan(7x+3) = OE/OJ

7x+3=arctan(OE/OJ)=45

x=6

12) a) x = 40

<ajq = <acq (base angles of isosceles triangle)

50+x+90=180

x=40

b) they are congruent triangle, reason HL (hypotenuse, leg)

aj=ac

aq=qa

right angle equal

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2 years ago

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meriva

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Step-by-step explanation:

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3 years ago

A whistle is made of a square tube with a notch cut in its edge, into which a baffle is brazed. Determine the dimensions d and θ

jasenka [17]

Answer:

d = 7.51 cm

θ = 60°

Step-by-step explanation:

The baffle used in the notch of a whistle is a triangular baffle (Isosceles triangle OAB).

For the isosceles triangle, the sides with equal dimension are OA and OB which is represented with d

d = the vertical component of the side of a triangle

It is given by

6.5cm = d sin60

d = 6.5/sin60

d = 7.505553499465134

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To calculate angle θ

Angle on a straight line is = 180

So, 60 + 60 + θ = 180

θ= 180 - 120

θ = 60°

(See attachments below)

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3 years ago