PATHFINDER-TRIGONOMETRIC RATIOS OF COMPOUND ANGLES-QUESTIONBANK
- Find the value of sin15^@
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- Prove that cos^2 45^@-sin^2 15^@=sqrt3/4
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- Evaluate: cos80^@cos20^@+sin80^@sin20^@
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- Prove that(sin(A+B)+sin(A-B))/(cos(A+B)+cos(A-B))=tanA
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- Prove that tan54^@=(cos9^@+sin9^@)/(cos9^@-sin9^@)
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- Evaluate:"sin"pi/4"cos"pi/(12)+"cos"pi/4"sin"pi/(12)
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- (tan ((pi)/(4) +x))/( tan ((pi)/(4) -x ))= ((1 + tan x )/( 1- tan x ))...
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- Prove that sin^2(pi/8+A/2)-sin^2(pi/8-A/2)=1/sqrt2sinA
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- Find the value of tan15^@
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- Prove that sin^2(n+1)A-sin^2nA=sin(2n+1)AsinA
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- If tan(A+B)=x and tan(A-B)=y find the value of tan2A.
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- If log(b) n = 2 and og(n) 2b = 2, then find the value of b.
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- Prove that (tan69^@+tan66^@)/(1-tan69^@tan66^@)=-1.
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- If tanA=5/6 and tanB=1/(11), Prove that A+B=pi/.4
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- Prove that sin^2B=sin^2A+sin^2(A-B)-2sinAcosBsin(A-B)
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- Prove that cos^2A+cos^2B-2cosAcosBcos(A+B)=sin^2(A+B).
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- Prove that tan8theta-tan6theta-tan2theta=tan8thetatan6thetatan2theta.
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- If tanA+tanB=a and cotA+cotB=b.Prove that cot(A+B)=1/a-1/b
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- If tanx+tan(x+pi/3)+tan(x+(2pi)/3)=3 then prove that (3tanx-tan^3x)/(1...
06:28
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- cos(beta-gamma)+cos(gamma-alpha)+cos(alpha-beta)=-3/2 show that cosalp...
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