Use the evenodd properties lo find the exact value of the ex

Use the even-odd properties lo find the exact value of the expression. Do not use a calculator. Cos(-150 degree) 1/2 -1/2 -squareroot 3/2 squareroot 3/2 Find the exact value of the indicated trigonometric function of theta. tan theta = - 10/7, theta in quadrant II. Find cos theta. 7squareroot 149/149 - 7 squareroot 149/7 squareroot 149/10 Use the fact that the trigonometric functions are periodic to find the exact value of the expression. Do not use a calculatate tan 930 degree sqaureroot 3 squareroot 3/2 -squareroot 3 squareroot 3/3 Convert the angle in radians to degrees. Express the answer in decimal form, rounded to two decimal places. Squareroot 2 81.35 degree -0.15 degree 81.03 degree 0.02 degree Convert the angle to a decimal in degrees. Round the answer to two decimal places. 99 degree 49 degree 11 degree 99.80 degree 99.78 degree 99.82 degree 99.83 degree Find the reference angle of the given angle. -517 degree 157 degree 23 degree 67 degree 113 degree A point on the terminal side of angle theta is given. Find the exact value of the indicated trigonometric function. (-1/3, 1/5) Find cos theta. 3squareroot 34/34 -5 squareroot 34/34 34/5 -34/3 Given tan theta = 2, Use trigonometric identities to find the exact value of csc(90 degree - theta). Squareroot 5 squareroot 5/2 1/2 2 A photographer points a camera at a window in a nearby building forming an angle of 42 degree with the camera platform. If the camera is 52m from the building, how high above the platform is the window, to the nearest hundredth of a meter? 46.82 m 57.75 m 0.9 m 1.11 m

Solution

1) cos(-150) = cos150   ; as cos function is even

cos(150) = cos(180 - 30) = -cos30 = -sqrt3/2

Option C

2) tantheta = -10/7 and theta is in Q-II. Find costheta

Hypotenuse = sqrt[10^2 +7^2] = sqrt149

costheta = - 7/sqrt149 = -7sqrt149/149

Option B