Sin^2 θ + 8 sin θ cos θ = cos^2 θ What is theta?

1 Answer
Write your answer here...
Start with a one sentence answer
Then teach the underlying concepts
Don't copy without citing sources
preview
?

Answer

Write a one sentence answer...

Answer:

Explanation

Explain in detail...

Explanation:

I want someone to double check my answer

Describe your changes (optional) 200

1
dk_ch Share
Feb 19, 2018

#Sin^2θ + 8 sin θ cos θ = cos^2θ #

#=>cos^2θ -sin^2theta- 4*2 sin θ cos θ = 0 #

#=>cos2θ - 4 sin2 θ= 0 #

#=>cos2θ = 4 sin2 θ#

#=>tan2theta=1/4#

#=>2theta=npi+tan^-1(1/4)" where "ninZZ#
#=>theta=(npi)/2+1/2tan^-1(1/4)" where "ninZZ#

Was this helpful? Let the contributor know!
1500