Answer:
6√2 i.
Step-by-step explanation:
√-72
= √72 i
= √36 * √2 i
= 6√2 i.
Answer:
29
Step-by-step explanation:
first sub in 3 wherever x is shown
(3)^2+8(3)-4 the use bedmas (brackets,exponents,division,multiplication,addition,subtraction)
solve brakets first
(3)^2=9
8(3)=24
rewrite equation ; 9+24-4=29
I cannot see it, please send another photo!
Answer:
−1/cotθ
1/cot(−θ)
tan(−θ)
Step-by-step explanation:
The tangent function is a the ratio for an angle defined as opposite / adjacent. A negative applied to −tan θ will give the opposite value. This is also true for the function when taken on a negative angle. tan(−θ) = −tan θ. This identity is also true for sin, sec, and cot. Recall that cotangent is the reciprocal of tangent and is defined as the ratio adjacent / opposite. Taking the reciprocal of cotangent will be the same as tangent. Using this information the following are equivalent:
1/cotθ
−1/cotθ ----> The reciprocal of Cot is Tan
1/cot(−θ)
----> The reciprocal of Cot is Tan and cot(−θ) = −cot θ.
−1/cot(−θ)
tan θ
tan(−θ)----> tan(−θ) = −tan θ