Answer: Option B.
Step-by-step explanation:
Here we can start with the relation
cos(x)^2 + sin(x)^2 = 1
multiply both sides by cos(x)
cos(x) = cos(x)^3 + sin(x)^2*cos(x) = cos(x)^2*(cos(xI + sin(x)^2/cos(x))
now we can replace sin(x)/cos(x) = tg(x)
cos(x) = cos(x)^2*(cos(x) + sin(x)*tan(x))
So the correct option is B
Hello from MrBillDoesMath!
Answer:
tan ^(-1) (6/7), the last expression in the list
Discussion:
In a right triangle,
tan(@) = side opposite angle\side adjacent to angle.
In our triangle, this becomes
tan(@) = LM \ MN = 6/7 =>
@ is the inverse tangent of (6/7)
Regards,
MrB
The answer is ‘A
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