Prove that:

cos20°cos40°cos80°=1/8

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

Step-by-step explanation:

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120 seems like the most sensible answer.

step-by-step explanation:

if there is only one topping on all caramel apples and there's 120 of them. then all apples should/will be covered in sprinkles. make sense?

answer: answer: d) v= 1/6 bh  

step-by-step explanation:

since according to the given question,   a pyramid is placed inside a prism.

step-by-step explanation: