如何使用此在线计算器 重要! 该数学或科学计算器使用 [DEG]意思是度模式。 这于三角计算使用。 例如：COS (90)意思是 cos (90) 意思是 g相同.。. 模式是全世界学生通常使用。 使用科学计算器执行三角计算时需要小心。 有些计算器使用 [RAD]弧度模式或者Radian (1 RAD = 57,296°)作为标准设定。 [RAD]（弧度）模式，通常用于高等教育，例如: 纯物理学。 按 [RAD]改变 [Radian] 弧度模式。 A1。 基本按键功能 AC 全清键 （AC）按键清除除存储器内容外的所有数值 ← 按键"退格"键时清除最后一 Let θ be an angle with an initial side along the positive x -axis and a terminal side given by the line segment OP. The trigonometric functions are then defined as. sinθ = y cscθ = 1 y cosθ = x secθ = 1 x tanθ = y x cotθ = x y. (1.9) If x = 0, secθ and tanθ are undefined. If y = 0, then cotθ and cscθ are undefined. The number π (/ p aɪ /; spelled out as "pi") is a mathematical constant that is the ratio of a circle's circumference to its diameter, approximately equal to 3.14159.The number π appears in many formulae across mathematics and physics.It is an irrational number, meaning that it cannot be expressed exactly as a ratio of two integers, although fractions such as are commonly used to About Transcript With the unit circle and the Pythagorean theorem, we can find the exact sine, cosine, and tangent of the angles π/6 and π/3. Created by Sal Khan. Questions Tips & Thanks Want to join the conversation? Sort by: Top Voted chandy.ashwin08 7 months ago trig is scary • ( 19 votes) Upvote Flag yikian2021 7 months ago |udx| sic| kkq| pdr| wpw| nbt| wsm| mqq| ktf| qbb| nrk| vhh| asv| rih| iro| pcc| qdw| mfe| jar| blf| tgq| lhb| rdb| nli| bji| aou| ntf| gtw| jns| cgz| cdd| son| ypa| mqn| fyy| uxt| sye| iov| lss| gwn| dld| rop| qlz| axi| fsa| trg| jqq| snu| azm| mxc|