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alexandr402 [8]
2 years ago
5

Please someone answer this it’s for tmr + 50 pts

Mathematics
1 answer:
suter [353]2 years ago
8 0

Step-by-step explanation:

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The question is in the screenshot
Sidana [21]

Answer:

b. -36/77

Step-by-step explanation:

As 0 < x < \pi/2 => tan x > 0

As 0< y <  \pi/2 => tan y > 0

We have the formula:

  • \frac{1}{sin^{2}x } =1 + cot^{2}x => \frac{1}{(8/17)^{2} } = 1+cot^{2}x => cot^{2} x=225/64

As tan x = 1/(cotx) => tan^{2}x = \frac{1}{cot^{2}x} =\frac{1}{225/64} = \frac{64}{225}

As tan x > 0 => tan x = 8/15

  • \frac{1}{cos^{2}y } = 1+tan^{2}y => \frac{1}{(3/5)^{2} } = 1 + tan^{2} y => tan^{2}y=\frac{16}{9}

As tan y > 0 => tan y = 4/3

As tan (x-y)= \frac{tan x - tan y}{1+ tanx * tany} =\frac{(8/15)-(4/3)}{1+(8/15)*(4/3)} = \frac{-36}{77}  

8 0
3 years ago
I need help ASAP, would really appreciate it, marking first as brainliest.
swat32

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3 0
3 years ago
Read 2 more answers
What is three-eighths plus one-half?
tankabanditka [31]

7/8, One should first make all the fractions have the same denominator so 3/8 and 1/2=4/8 so then add 3/8+4/8=7/8
5 0
3 years ago
Read 2 more answers
Kevin has $25. MP3 downloads cost $0.75 each. How many songs can he download and still have $13 left to spend?
matrenka [14]
It would be .75x=25-13
So .75x=12
x=16 because .75×16=12
8 0
3 years ago
Read 2 more answers
What is the formula for surface area? Giving brainliest to the correct answer
Kitty [74]

Answer: Surface area is the sum of the areas of all faces (or surfaces) on a 3D shape. A cuboid has 6 rectangular faces. To find the surface area of a cuboid, add the areas of all 6 faces. We can also label the length (l), width (w), and height (h) of the prism and use the formula, SA=2lw+2lh+2hw, to find the surface area

5 0
3 years ago
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