Cos is short for Cosine ( Complementary Sine)
Similrly
Sin is short for Sine
Tan is short for Tangent.
Algebraically it is written as Cos(56) However, on the calculator, make sure your calculator is 'clear' and in 'degree' mode. Cos(56) = 0.559182903.... Cos(56) = 0.5592 ( 4 d.p.) or Cos(56) = 0.559183 (6 d.p.). NB If your calculator is in 'inverse', 'radian' or 'grad(g)' modes you will have an incorrect answer.
This can be done on a graphing calculator by making sure you have your calculator in degrees mode, and then tentering the cos(23). You get an answer of 0.9205048535.
Cos(16) = On the calculator = 0.96126.... Using the calculator , make sure its in 'clear' and in 'degree' mode. Press 'Cos' '16' '=' And the screen should show the bove answer.
First make sure the calculator is in 'Degree Mode'. Then press 'Cos' , followed by the angle in degrees, say '60' degrees, then press equals (=), and the answer should read '0.5'. NB If the calculator is in 'Radiuan Mode' Press 'Cos' followed by ' pi' divide '3' . Then equals (=) , again the answer should be '0.5'.
Things
Algebraically it is written as Cos(56) However, on the calculator, make sure your calculator is 'clear' and in 'degree' mode. Cos(56) = 0.559182903.... Cos(56) = 0.5592 ( 4 d.p.) or Cos(56) = 0.559183 (6 d.p.). NB If your calculator is in 'inverse', 'radian' or 'grad(g)' modes you will have an incorrect answer.
cos(60) = 0.5 The simplest way is to use a calculator.
For any calculator Sec(Secant) = 1/Cos Csc (Cosecant) = 1/ Sin Cot (Cotangent) = 1/Tan
It is usually [Shift] [cos] though on some calculators it may be [2ndF] [cos] The arc cos function is often written as cos-1 or acos, and on most calculators is written above the button to press; the colour of the text used to write it usually matches up with the key needed to press before the cos button. On Casio calculators, it is [shift][cos] with the shift key labelled in yellow, and cos-1 written in yellow. On a Texas Instruments calculator it is [2nd] [cos] with the 2nd key labelled in blue and the cos-1 written in blue. On a Hewlett Packard calculator it is [<up_arrow_pointing_left>][cos] with the up_arrow_pointing left a white key with a black arrow and ACOS written in white above the cos button.
This can be done on a graphing calculator by making sure you have your calculator in degrees mode, and then tentering the cos(23). You get an answer of 0.9205048535.
Press the button labeled "COS"
It is labeled as "cos-1" on the calculator. But arcosine and inverse cosine are just two names for the same thing.
y = arcsin( cos 48 ); arcsin may be seen as sin-1 on your calculator.
the answer is 180 degrees; since cos 180⁰ = -1, then cos-1 -1 = 180⁰ mathematically cos-1-1 here calculator is required and you'll get answer 180 degrees.....
Cos is short for 'Cosine' / It is the complementary curve to 'Sine'.
Cos(16) = On the calculator = 0.96126.... Using the calculator , make sure its in 'clear' and in 'degree' mode. Press 'Cos' '16' '=' And the screen should show the bove answer.
sec x = 1/cos x → sec³ x = 1/cos³ x or sec³ x = (cos x)^-3 Therefore to enter sec³ x on a calculator: Newer, "natural" calculators: mathio: sec³ x → [x-power] [cos] [<angle>] [)] [navigate →] [(-)] [3] [=] lineio: sec³ x → [(] [cos] [)] [)] [x-power] [(-)] [3] [)] [=] Older, function acts on displayed number calculators: sec³ x → [angle] [cos] [x-power] [3] [±] [=]