Answers

2015-10-10T18:30:25+05:30
Sin = prependicular/hypotenus.
cos = base/hypotenus.
tan = prependicular/base.
cosec = reciprocal of sin.
sec = reciprocal of cos.
cot = reciprocal of tan.
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2015-10-10T18:48:14+05:30
1.sin (90*-A)=cosA
cos (90*-A)=sinA
2.tan (90*-A)=cotA
cot (90*-A)=tanA
3.sec(90*-A)=cosecA
cosec(90*-A)=secA

sin2A+cos2A=1
sec2A-tan2A=1
cosec2A=1+cot2A
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