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V PUBLICATION-TRIGNOMETRC FUNCTIONS-QUESTION BANK
- Find the value of tan((19pi)/3)
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- Find the value of sin((-11pi)/3)
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- Find the value of the trigonometric functions. cot (-(15pi)/4)
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- Show that cos (x-y)=cos ^(2)x cos ^(2) y+sin x . sin y
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- Show that cos ((pi)/(2)-x)=sin x
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- Show that sin ((pi)/(2)-x)=cos x
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- sin (x+y)=sin x cos y+cos x sin y' We know that
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- sin (x+y)=cos ((pi)/(2)-(x+y))=cos (((pi)/(2)-x)-y))'=cos ((pi)/(2)-x)...
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- (tan x+tan y)/(1-tanxtany) =……………
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- Show tht tan (x-y)=(tan x-tan y)/(1+tan x tan y)
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- If none of the angles x, y and (x+y) is a multiple of pi, then cot (x+...
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- Show that cot (x-y)=(cot x cot y+1)/(cot y-cot x)
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- Show that cos 2 x=cos ^(2) x-sin ^(2) x=2 cos ^(2) x-1=1-2 sin ^(2) x...
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- Show that sin 2 x=2 sin x cosx=(2 tan x)/(1+tan ^(2) x)
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- Show that tan 2 x=(2 tan x)/(1-tan ^(2) x)
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- Show that sin 3 x=3 sin x-4 sin ^(3) x
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- Show that cos 3 x=4 cos ^(3)x-3 cos x
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- Show that tan 3 x=(3 tan x-tan ^(3) x)/(1-3 tan ^(2) x)
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- Show that (i) cos x+cos y=2 cos (x+y)/(2) cos (x-y)/(2) (ii) cos x-...
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- Prove that (i) 2 cos x cos y=cos (x+y)+cos (x-y) (ii) -2 . sin x s...
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