15. Find all solutions in the interval (0,2) (a) — sin(20) = (b) - 3 cos(2x) - 0.8 - 0
For cos x cos 3x – sin x sin 3x = 0, use an addition or subtraction formula to simplify the equation and then find all solutions of the equation in the interval x (0,7). The answer is 21 22 = 23 = and 14 with xi < 22 <<3 < 24.
7. Given cos 20 = --and 180° <0 < 270°, find values of sino and cose.
Solve 5 sin(20) + 6 cos(0) = 0 for all solutions 0 = 0 < 27 Give exact answers or answers accurate to 3 decimal places, as appropriate
Use a trigonometric identity to find exactly all solutions: cos 20 = sin , 0<o<21. Enter the exact answers in increasing order. O= Edit 6 31 Edit 2 II 5a 6 Edit
g and h
g. sin+1-0 sin 2θ-3 cos 26(to find the solutions in [0,2π), use a calc. for this one only) i, sin 2e-V3 cos θ 0
Find all solutions in the interval [0, 21). 2 sin ?x-3 sin x= -1 (Type an exact answer, using it as needed. Use a comma to separate
4. If cose 3 and i << -1 , find the exact value of 4 a. sin b. tane
Find the exact radian solutions for all which are solutions of the equation. V3+ 2 sin 20 = 0 (4) - Use the quadratic formula to solve for the solutions of the equation in the interval [0°, 360°). Approximate the solutions to the nearest 0.1°. 5sin? x + 2 sin x – 1 = 0
Find all solutions of the equation in the interval [0, 21). sin 0(2 cos 0 - /3)=0 Write your answer in radians in terms of n.