Ask a New Question

If tan theta= 3 and Pi<theta<3Pi/2,

find cos theta.

Pi=3.141592654

1 answer

1^2+3^2 = 1+9 = 10
so hypotenuse = sqrt(10)
cos theta = 1/sqrt(10)
or -1/sqrt(10) in third quadrant

Similar Questions

Multiple Choice (theta) means the symbol 0 with the dash in it.1.)Which expression is equivalent to
1. 2 answers
Multiple ChoiceWhich expression is NOT equivalent to 1? (theta) means 0 with dash in it. A.)sin^2 (theta)+cot^2 (theta) sin^2
1. 0 answers
Suppose that \Theta takes values in [0,1] and its PDF is of the formf_{\Theta }(\theta )= a\theta (1-\theta )^2,\ \ \
1. 1 answer
Justin wants to evaluate 3cot(-5pi/4). Which of the following identities can he use to help him? Select two answers.cot(-theta)
1. 5 answers

more similar questions