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# Solving Trigonometric Equations with Identities - Degrees and Radians

1. 1
Solve for $0°\leq x \leq360°$

$$2\sin^2 x+\cos x -1=0$$
( use trig identities. )
2. 2
Solve for $0\leq x \leq 2\pi$

$$2\cos^2 x+\sin x=1$$
3. 3
Solve for $0°\leq x \leq360°$

$$8\sin^2 x-10\cos x -11=0$$
4. 4
Solve for $0\leq x \leq 2\pi$

$$8\cos^2 x-10\sin x =11$$
5. 5
Solve for $0°\leq x \leq360°$

$$-6\sin^2 x-\cos x +5=0$$
6. 6
Solve for $0\leq x \leq 2\pi$

$$-6\cos^2 x +5=\sin x$$
7. 7
Solve for $0°\leq x \leq360°$

$$4\sin^2 x+4\cos x -5=0$$
8. 8
Solve for $0\leq x \leq 2\pi$

$$4\cos^2 x -5=-4\sin x$$
9. 9
Solve for $0°\leq x \leq 360°$

$$\sin x - \cos x=0$$
10. 10
Solve for $0\leq x \leq 2\pi$

$$\sin x + \cos x=0$$
11. 11
Solve for $0°\leq x \leq 360°$

$$\csc x - 2=0$$
12. 12
Solve for $0\leq x \leq 2\pi$

$$\csc x + \sec x=0$$
13. 13
Solve for $0\leq x \leq 2\pi$

$$2\cot x = -\sqrt 3\csc x$$

( trigonometry / trig )

$$e=mc^2$$