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Brut [27]
3 years ago
7

Please prove the following trigonometric identity.​

Mathematics
1 answer:
Brums [2.3K]3 years ago
3 0

Step-by-step explanation:

solution:- from LHS 1-cos²x/sinx

∵ 1-cos²x = sin²x

∴ sin²x /sinx = sinx

from RHS tanx × cosx

∵tanx = sinx×cosx

∴ sinx/ cosx × cosx = sinx

Since, LHS = RHS proved ___

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In a bag there are 4 black marbles and 2 green marbles. What is the probability of choosing a black marble, not replacing it, th
uranmaximum [27]

Answer:

It'd be 4/15

Step-by-step explanation:

The total marbles is 6, so for black it's 4/6, but it's not being put back in so for the next one, the denominator would be 5. For green it's 2/5

4/6 times 2/5 equal 4/15

Hope this helps!

8 0
3 years ago
A principal of $2400 is invested at 7.25% Interest, compounded annually. How much will the investment be worth after 13 years?
skelet666 [1.2K]

Answer:

Step-by-step explanation:

70000

7 0
3 years ago
Given that the straight line 2x + 3y-10=0 intersects the x - axis at P. Find the
tino4ka555 [31]

Answer:

P(5, 0 )

Step-by-step explanation:

Where the line crosses the x- axis the y- coordinate of the point P is zero.

Substitute y = 0 into the equation and solve for x

2x + 3(0) - 10 = 0 , that is

2x - 10 = 0 ( add 10 to both sides )

2x = 10 ( divide both sides by 2 )

x = 5

Thus P = (5, 0 )

3 0
3 years ago
Simplify the quadratic term by squaring the (x+1) term.
tensa zangetsu [6.8K]

Answer:

y =  -2x^2 -4x +1

Step-by-step explanation:

y-3 = -2 (x+1)^2

Foil (x+1)^2

(x+1)(x+1) = x^2 +x+x+1 = x^2 +2x+1

Substitute this back in

y-3 = -2(x^2 +2x+1)

Distribute

y-3 = -2x^2 -4x -2

Add 3 to each side

y-3+3 = -2x^2 -4x -2+3

y =  -2x^2 -4x +1

6 0
3 years ago
Cecil’s remark in line 1 ("Lucy . . . faults") is made
kumpel [21]

Correct option is A. Cecil’s remark in line 1 ("Lucy . . . faults") is made

in a tone of great conviction

Cecil is most sincere when he says that Lucy Honeychurch has no flaws. He completely believes this. Thus we can conclude that the tone here is that of great conviction. Thus A is the best answer.

the lines of the passage were -

Lucy Honeychurch has no faults,” said Cecil, with grave sincerity.

“I quite agree. At present she has none.”

“At present?”

To learn more about passages from given link

brainly.com/question/12555695

#SPJ4

3 0
1 year ago
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