Aldo went for a drive in his new car. He drove 312.5 miles in 5 hours. What was his speed?
2 answers:
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Answer:
see explanation
Step-by-step explanation:
Using the double angle identity for sine
sin2x = 2sinxcosx
Consider left side
cos20°cos40°cos80°
= (2sin20°cos20°)cos40°cos80°
= (2sin40°cos40°)cos80°
= (sin80°cos80° )
= (2sin80°cos80° )
= . sin160°
= . sin(180 - 20)°
= . sin20°
= = right side , thus proven
If you need to simplify the equation it would be:
+2r-2n+7
If not sorry..
Hope This Helps!
If not sorry..
Hope This Helps!
Step-by-step explanation:
hence the value of y=-9/4and k=-16.
