Why do we ignore the negative sign when finding basic angle when solving trigonometric equations?
104410
Why do we omit the negative sign when finding basic angle when solving trigonometric equations?
34868
Determining the angle degree of an arc in ellipse?
58958
How to understand dot product is the angle's cosine?
73512
Trigonometry Olympiad Question
39862
Why does the derivative of sine only work for radians?
106483
How to find angle x without calculator?
84420
When is $\sin(x) = \cos(x)$?
650
Modulus operation with negatives values - weird thing?
67988
Trigonometric curiosity
148871
Sign of the vector (especially $g$) while calculating
86894
Finding solution of a Trigonometric equation
89561
Find the sum of angles without trigonometry?
41204
Why do I get one extra wrong solution when solving $2-x=-\sqrt{x}$?
107390
Why is (-1)(-1) = 1?
95979
Trigonometry and algebra question
45227
If $\sin \theta+\cos\theta+\tan\theta+\cot\theta+\sec\theta+\csc\theta=7$, then $\sin 2\theta$ is a root of $x^2 -44x +36=0$ My own bonafide attempt.
81102
Cosine of the sum of two solutions of trigonometric equation $a\cos \theta + b\sin \theta = c$