Cos (-157.5)= (Cos (157.50) = Cos (2) 157.5.2 3159 It Cos@ 2 1 + Cos 315 3150 V - 157.50 - = 2+2 4 2+52 2 1 11 Sin (-157.5) Sin (157.50)

solve for sin please, thank u

sin (-157.5) sin (157.50)

Q10;

Consider The Matrix M :-X2 Y2 1 , Where R, Yl, 2 2-Uz, 23 And 3ts Are Real Numbers. (1 Find Det (M) (2) Find The Necessary And Sufficient Condition Under Which M Is Singular. (3) Find The Necessary And Sufficient Condition Under Which The Points P(Y). P2 22). Ps(3, Ys) Belong To The Same Line. Recall That The Standard Equation Of A Line In The

Q11;

If you have 1 liter of Oxygen gas, how many moles of gas do you have?

Calculate the molar mass of each gas using the empirical formula given above the video. After the gas is added, read the mass from the scale in the video. Using the table below, record the molar mass you calculated and the mass for one liter in the data table. Make a graph showing the molar mass for each gas on the horizontal axis, and the mass for one liter of gas on the vertical axis. Repeat for all the gases. Hint: (from Dr. Denton)