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yazukastinger

(@ is notation for angle)

*Sin (90 + @) = Cos@ (Use it for other ratios)

*Cos (90 + @) = -Sin@

*Sin (180 - @) = Sin@ (Use it for other ratios)

*Cos (180 - @) = -Cos@

*Sin (180 + @) = -Sin@ (Use it for other ratios)

*Cos (180 + @) = -Cos@

*Sin (270 - @) = -Cos@ (Use it for other ratios)

*Cos (270 - @) = -Sin@

*Sin (270 + @) = -Cos@ (Use it for other ratios)

*Cos (270 + @) = Sin@

*Sin (360 - @) = -Sin@ (Use it for other ratios)

*Cos (360 - @) = Cos@

*Sin (360 + @) = Sin@ (Use it for other ratios)

*Cos (360 + @) = Cos@

**NOTE:- (180 + @) , (360 + @) ---- RATIO REMAINS SAME.

(90 + @) , (270 + @) ---- RATIO CHANGES TO ITS CO-RATIO.

*Sin (A + B) + Sin (A - B) = 2sinA.cosB

*Sin (A + B) - Sin (A - B) = 2cosA.sinB

*Cos (A + B) + Cos (A - B) = 2cosA.cosB

*Cos (A + B) - Cos (A - B) = -2sinA.sinB

*Sin (A + B) = SinA.CosB + CosA.SinB

*Sin (A - B) = SinA.CosB - CosA.SinB

*Cos (A + B) = CosA.CosB - SinA.SinB

*Cos (A - B) = CosA.CosB + SinA.SinB

*Tan (A + B) = TanA + TanB

1 - TanA.TanB

*Tan (A - B) = TanA - TanB

1 + TanA.TanB

*Sin 2A = 2sinA.cosA

*Sin 3A = 3sinA - 4sin³A

*Sin 4A = 2sin2A.cos2A

*Sin 5A = 16sin⁵A - 20sin³A + 5sinA

*Cos 2A = 1 - 2sin²A

*Cos 3A = 4cos³A - 3cosA

*Cos 4A = 1 - 2sin²2A

*Cos 5A = 16cos⁵A - 20 cos³A + 5cosA

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