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Tresset [83]
3 years ago
6

Help ppppppppppppllllllllllllllllsssssssss

Mathematics
1 answer:
nlexa [21]3 years ago
3 0

Answer:

The answer is tan²Ф + 1 = sec²Ф

Step-by-step explanation:

∵ sin²Ф + cos²Ф = 1 ⇒ ÷ cos²Ф both sides

∴ sin²Ф/cos²Ф + cos²Ф/cos²Ф = 1/cos²Ф

∵ sin²Ф/cos²Ф = tan²Ф

∵ 1/cos²Ф = sec²Ф

∴ tan²Ф + 1 = sec²Ф

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The first step to solve 2x - 5 = 13 is:
Triss [41]

Answer:   First add 5 to both sides

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2 years ago
in an examination 60% exam in failed in maths 55% failed in English and 25 failed in both subjects if none of the exam in past i
masha68 [24]

Answer:

60% x 25

55 % x 25

10 in english

25 is total and rest will be math

so 25-10 = 15

15 students failed math

4 0
2 years ago
BRAINLIEST IF YOU HELP the correct simplification of 7x2(6x + 3x2 − 4)? A 21x4 − 42x3 + 28x2 B 42x4 + 21x3 − 3x2 C 21x4 + 42x3 −
exis [7]

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3 0
2 years ago
The sum of two numbers is 65. The smaller number is 11 less than the larger number. What are the numbers?
Irina-Kira [14]
Sum means u add the two numbers together

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7 0
3 years ago
a bag contains 10 white gold balls and 6 striped golf balls. a golfer wants to add 112 golf balls to the bag. he wants the ratio
wolverine [178]

Answer:70 white golf balls and 42 striped golf balls

Step-by-step explanation:

First we find the ratio of white to striped balls

White golf balls = 10

Striped golf balls = 6

Ratio = 10/6 = 5/3

We are told a golfer wants to add extra 112 balls to the already 16 balls

And the ratio after adding 112 balls must stay the same

First we label the extra golf balls to be added x and y

x = white golf balls

y = striped golf balls

So since we know the 112 balls added is a combination of the extra white golf balls and striped golf balls, we create an equation for that, labelling it (1)

x + y = 112 (1)

And we are told that after putting these extra balls the ratio must remain the same, which is 5/3

which will be (10 white balls + x) divided by (6 striped ball + y) will be equals to 5/3

So we create another equation for this, labelling it (2)

(10+x)/(6+y) = 5/3 (2)

So we have two simultaneous equations

We pick (1)

x + y = 112

We either make x or y the subject of formula, I choose to make x the subject of formula, we label the equation (3)

take y to the other side, causing it to change to -y

x = 112 - y (3)

We then work with (2)

(10+x)/(6+y) = 5/3

We cross multiply

3(10+x) = 5(6+y)

We open the brackets

Making the equation simplified and labelling it (4)

30 +3x = 30 + 5y

Collect like terms

3x -5y = 30-30

3x -5y = 0 (4)

Remember from (3) we know that

x = 112 -y

So we put (3) in (4)

3(112 - y) - 5y = 0

Open bracket

336 -3y -5y =0

336 -8y = 0

Transfer -8y to the other side, changing to +8y

336 = 8y

Divide both sides by 8

336/8 = y

42 = y

y = 42

from (3) we know that x equals 112 - y

So we put y = 42 in (3)

x = 112 - y

x = 112 -42 = 70

x = 70

So therefore number of white golfs balls and striped golfs balls to be added to keep the same ratio is 70 and 42 respectively

4 0
3 years ago
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