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cosecant of X =1/sin(X), must not be confused with arc sine [sin^-1]
secant of X =1/cos(X), must not be confused with arc cosine [cos^-1]
cotangent of X =1/tan(X), must not be confused with arc tangent [tan^-1]
Because of these simple relations, calculator makers do not implement them with specific key sequences. On this calculator, you have two ways to calculate one of these functions. EX cosecant of 37 degrees
You enter 1 / [sin] 37 [ ) ] [ENTER] result is 1.661640141
You enter [sin] [ ) ] 37 [ENTER] followed by [X^-1] to take the reciprocal of the previous answer. The [X^-1] key is the one just below [MATH].
A word of caution: secant cosecant and cotangent must not be confused with the inverse trigonometric functions arcsin, arccos, arctan
Hello, It may be due to the angle unit used. You can have angles in degrees, in radians, and in grads. You should set the default angle unit to waht you problem calls for. To set degree as default SHIFT MODE 3 To set radians as default SHIFT MODE 4 To set grads as default SHIFT MODE 5
The values of angles calculated by the inverse trigonometric functions are in the default unit that is set . This may be the source of the wrong answers that you get.