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3 years ago

What is the value of sin(−θ) ?

Mathematics

1 answer:

Neko [114]3 years ago

5 0

Answer:

Step-by-step explanation:

The cosine of a right triangle is the adjacent over the hypotenuse. If the cosine is -3/5 then it must be a right triangle with sides 3, 4, & 5 since this is a Pythagorean triple. This means the sin will be -4/5. We know its negative because the tangent is positive so this is the 3rd quadrant where both Sine and Cosine are negative.

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For f(x) = x^2 and g(x) = x^2 + 2, find the following composite functions and state the domain of each

OleMash [197]

Answer:

$composite \: function \: is \: given \: as \: in \: two \: forms \\ \\ f(g(x))and \: g(f(x)) \: therefore \: f(g(x)) =( x {}^{2} ) {}^{2} + 2 \\ whereas \: g(f(x)) = (x {}^{2} + 2) {}^{2} \\ domain of \: f(x) = x {}^{2} is( \infty - \infty ) \: and \: domain \: of \: g(x) = x {}^{2} + 2 \: is \: also \: ( \infty - \infty )$

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2 years ago

you accidentally dropped a coin from the top of 10 stairs. what is the probability that it will land on the 4th step facing up

Roman55 [17]

Answer:

Step-by-step explanation:

1/10 * 1/4 = 1/14

1/2 because there is a 50/50% chance its either heads or tails

3 0

4 years ago

What is value of the expression -2r/5s if r = -1/4 and s = 4/5?

Tanzania [10]

I don't know if this is right but 0.125

3 0

3 years ago

Read 2 more answers

What is a 200yd football field in meters in Europe

timofeeve [1]

Answer:

180 meters

Step-by-step explanation:

100yd field is 90 meters so a 200yd field is 180 meters

8 0

3 years ago

Can someone help?

lutik1710 [3]

Answer:

Step-by-step explanation:

21(a)

21 cm = 13 cm = 8 cm

21(b)

Increase in depth from 6 sec to 11 sec: 8 cm

Time from 6 sec to 11 sec: 11 sec - 6 sec = 5 sec

Rate = (8 cm)/(5 sec) = 1.6 cm/sec

3 0

4 years ago