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Archy [21]
2 years ago
15

Which relationship in the triangle must be true ?

Mathematics
2 answers:
Inga [223]2 years ago
4 0

Answer:

option B

Step-by-step explanation:

from the given options

a)      sin (B)  = sin (A)

b)      sin (B ) = cos (90° - B)

        cos (90° - B ) = Sin B

c)       cos  (B ) =  sin(180° - B)

         sin(180° - B) = sin (B)

d)        cos (B)  = cos(A)

so, we can clearly see from the above solution that option B is correct.

As 90° - B is in first quadrant and in first quadrant sign of cos dose not change  and 90 is multiple of odd so 'cos' changes to 'sin'

Ivan2 years ago
3 0

Answer:

Choice B. sin(B)=cos(90-B)

Step-by-step explanation:

That cofunction identity is the one you looking for...choice B.

If you aren't convinced or don't know that identity, then maybe this will help:

90-B is actually the same thing as saying A for this right triangle since A+B=90.

So choice B basically says sin(B)=cos(A)

Well let's find both sin(B) and cos(A)

sin(B)=b/c

cos(A)=b/c

Those are the same ratios!

So they are equal!

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Setler [38]

Answer:

32−4x=12

Step-by-step explanation:To be honest I dont think I have a good explanation but I do know my answer is acurate.

7 0
3 years ago
"let v be the event that a computer contains a virus, and let w be the event that a computer contains a worm. suppose p(v) = 0.1
morpeh [17]

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Substituting these values in the formula, we will get

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7 0
2 years ago
Find the upper quartile of this data set: 593, 588, 540, 434, 420, 398, 390, 375
ratelena [41]
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4 0
3 years ago
Triangle ABC has perimeter 22 cm.
Serggg [28]

Answer:

Step-by-step explanation:

A = 8 cm

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3 0
2 years ago
Which weighs more: a watermelon that weighs 19.5 kilograms or a toddler that weighs 40 pounds?
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7 0
3 years ago
Read 2 more answers
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