If you mean to find 4 cos(2<em>a</em>), then recall the double angle identity for cosine:
cos(2<em>x</em>) = 2 cos²(<em>x</em>) - 1
so that
4 cos(2<em>a</em>) = 4 (2 cos²(<em>x</em>) - 1) = 4 (√3 - 1)
A = C. Msg if u need more help :3
Answer:
Step-by-step explanation:65-9=56, 56/2=28, 28+9=37 so 28+37=65
Answer: their is no inverse
Step-by-step explanation:Opposite in effect.
−
5
is the additive inverse of
5
, because their sum is zero.
1
3
is the multiplicative inverse of
3
, because their product is
1
.
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