Answer:
cos(π/3)cos(π/5) + sin(π/3)sin(π/5) = cos(2π/15)
Step-by-step explanation:
We will make use of trig identities to solve this. Here are some common trig identities.
Cos (A + B) = cosAcosB – sinAsinB
Cos (A – B) = cosAcosB + sinAsinB
Sin (A + B) = sinAcosB + sinBcosA
Sin (A – B) = sinAcosB – sinBcosA
Given cos(π/3)cos(π/5) + sin(π/3)sin(π/5) if we let A = π/3 and B = π/5, it reduces to
cosAcosB + sinAsinB and we know that
cosAcosB + sinAsinB = cos(A – B). Therefore,
cos(π/3)cos(π/5) + sin(π/3)sin(π/5) = cos(π/3 – π/5) = cos(2π/15)
The Y Intercept is wherever 0 is at on each
1. 1/4 *** y=1/4x+2
2.-1/10 *** y=-1/10x+60
3.y=-1/0.5 *** y=-1/0.5x
Answer:
d. BC=30
Step-by-step explanation:
triangle ABC is cut by a diagnal AD into two equal triangles .So if BD is 15 ,DC will also be 15
therefor total length of BC wil be 30 (15 +15)
Answer:
I think it's an Isosceles Triangle
Step-by-step explanation:
Here are the fegrees for the Isosceles Triangle Isosceles Triangle degrees 68, 56, 56.
Hope this helped.
Answer:
yuh
Step-by-step explanation:
cuz why not
