document.write( "Question 858094: Which of the following statements are true?
\n" ); document.write( "a) For θ ∈ ] π/2 , π [ , both cos θ and sin θ are decreasing.
\n" ); document.write( "b) If 3π/2 ≤ θ ≤ 2π , then cos θ is decreasing.
\n" ); document.write( "c) In Quadrant 3, sin θ < 0 and cos θ < 0.
\n" ); document.write( "d) For θ ∈ [0, 2π] sin θ increases only when θ ∈ ] π/2 [
\n" ); document.write( "e) f(x) = cos x is increasing in the interval ]-2π,-π[
\n" ); document.write( "Can you please help me ? Thanks so much in advance:) \n" ); document.write( "

Algebra.Com's Answer #517020 by stanbon(75887) $\"\"$ $\"About$

You can put this solution on YOUR website!
Which of the following statements are true?
\n" ); document.write( "a) For θ ∈ ] π/2 , π [ , both cos θ and sin θ are decreasing:: true
\n" ); document.write( "-----------------------------------------------
\n" ); document.write( "b) If 3π/2 ≤ θ ≤ 2π , then cos θ is decreasing.:: false
\n" ); document.write( "--------------------------------------
\n" ); document.write( "c) In Quadrant 3, sin θ < 0 and cos θ < 0.:: true
\n" ); document.write( "-------------------------------------------------------
\n" ); document.write( "d) For θ ∈ [0, 2π] sin θ increases only when θ ∈ ] π/2 :: false
\n" ); document.write( "---------------------------------------------
\n" ); document.write( "e) f(x) = cos x is increasing in the interval ]-2π,-π[:: false
\n" ); document.write( "---------------------------------------
\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
\n" ); document.write( "================
\n" ); document.write( "Can you please help me ? Thanks so much in advance:)
\n" ); document.write( " \n" ); document.write( "

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