We'll assume this is an arbitrary triangle ABC.
A) No, the sines of two different angles can be whatever they want
B) sin(B)=cos(90-B)
Yes, that's always true. The "co" in cosine means "complementary" as in the complementary angle, which adds to 90. So the sine of an angle is the cosine of the complementary angle.
C) No, the correct identity is sin(180-B)=sin B. Supplementary angles share the same sine.
D) Just like A, different triangle angles often have different cosines.
Answer: Choice B
Answer:
yes your answer is correct 31.4
Step-by-step explanation:
given
Radius (r) = 5 inches
circumference (c)
= 2πr
= 2 * 3.14 * 5
= 31.4 inches
The graph represents y=-4x-1
If you notice the line, it goes past the -1 on the y axis which indicates that the y intercept is -1 since that was the only choice which displayed this, we know that our answer is y=-4x-1
First, simplify the (x+2)(x+2) with FOIL:
f(x)=(
)-3
Combine like terms
f(x)=
Then you have standard form.
Hope that helps.
