imp. formulas of trigonometry
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2
sin2x + cos2x =1
1+tan2x=sec2x
1+cot2x=cosec2x
tan/x=sinx/cosx
1/tanx=cotx
1/sinx=cosecx
1/cosx=cotx
1+tan2x=sec2x
1+cot2x=cosec2x
tan/x=sinx/cosx
1/tanx=cotx
1/sinx=cosecx
1/cosx=cotx
Answered by
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sin^2X + cos^2X = 1
1 + tan^2X = sec^2X
1 + cot^2X = cosec^2X
tan= sin/cos
sin=1/cosec,
tan=1/cot
cos=1/sec
sinX=cos(90-X)
tanX=cot(90-X)
secX=cosec(90-X) and vice versa
1 + tan^2X = sec^2X
1 + cot^2X = cosec^2X
tan= sin/cos
sin=1/cosec,
tan=1/cot
cos=1/sec
sinX=cos(90-X)
tanX=cot(90-X)
secX=cosec(90-X) and vice versa
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