Find the four smallest positive numbers 0 such that tan 0=-1 [Write your answers in ascending order.]

Find the four smallest positive numbers 0 such that tan 0=-1 [Write your answers in ascending order.]

Given the following delta H values H2+1/2O2--->H2O delta H =-285.8 H2O2---->H2+O2 delta H = 187.6 Calculate delta H rxn for the following reaction H2O2--->H2O + 1/2O2

14.77 mL of 0.4926 M NaOH is used to titrate 10.00 mL of vinegar to the end point. What is the molarity of acetic acid present in the vinegar solution? Hint: How many moles of acetic acid was titrated?

Hi Nyuyen this is your answer

trigonometric values 0 to 90

Double angle formulas of sinA, Cos A and tan A

Double angle formulas of  sin 2A , Cos 2A and tan2A 

             sin(2A)   = 2sinAcosA

             cos(2A)  = 2cos^2A- sin^2 A 

             cos(2A)  = 1- 2sin^2A

             cos(2A)  =  2cos^2A - 1 

             tan (2A)  =  2tanA / (1- tan^2A)

Double angle formula for sinA.cosA and tan A