SOLUTION: If cos β = - 3/5 then, without a calculator, find cos(𝛑/2 - β). Write your answer as a fraction please.
Thank You
Algebra.Com
Question 1145659: If cos β = - 3/5 then, without a calculator, find cos(𝛑/2 - β). Write your answer as a fraction please.
Thank You
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
If cos β = - 3/5 then, without a calculator, find cos(𝛑/2 - β).
------------
cos(𝛑/2 - β) = sin(β)
-------
sin(B) = sqrt(1 - cos^2(B)) = 4/5 or -4/5
======
Cos is negative in Q2 and Q3.
Sin is positive in Q2 and negative in Q3
RELATED QUESTIONS
If {{{ cos(beta) = -3 / 5 }}} then, without a calculator, find {{{cos(pi / 2 - beta) }}}. (answered by mananth,ikleyn,MathLover1,MathTherapy)
If cos β = -3/5 then, without a calculator, find cos( π/2 - β) and express your answer (answered by solver91311)
If tan β = 4/5 then, without a calculator, find tan(𝛑/2 - β). Write your answer as a (answered by solver91311)
If cosθ = -3/5, find cos(pi/2 - θ). Write your answer as a... (answered by MathLover1)
If cosθ=-3/5, find cos(π/2-θ). Write your answer as a... (answered by MathLover1,ikleyn)
If {{{ tan(x) = 4 / 5 }}} then, without a calculator, find {{{tan(pi / 2 - x) }}}. Write... (answered by math_tutor2020)
Evaluate without using a calculator.
sin θ, if cos θ = 2/5 and tan θ < 0. (answered by lwsshak3)
If tan β = 4/5 then, without a calculator, find tan( π/2 - β) and express the answer... (answered by ikleyn,noahmogs)
Given tan θ = -5/12 and cos θ > 0, find csc θ. Write your answer as a... (answered by josgarithmetic,Theo)