Trigonometry

Trigonometry
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What is the expansion of cos(A+B+C) in terms of cos?
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1
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414
Prashant Kumar
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For any triangle ABC prove that Sin B-C/2=B-C/A cos A/
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0
Views
233
admins
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If tan^2A = 1+ 2tan^2B then prove that cos^2 B=2 cos^2 A
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0
Views
259
admins
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Find the value of this equation, Tan1°+ Tan2°+ ..........Tan89°=
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0
Views
331
admins
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Find the radius of the circle in which a central angle of 60° intercepts an arc of length 37.4 cm (use π = 22/7)?
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0
Views
345
admins
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What is double angle formula of sine & cosine in terms of tan
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0
Views
204
admins
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Prove that .(sinAsinB)/(cosA+cosB)=(2tan(A/2)tan(B/2))/(1-tan^2(A/2)tan^2(B/2))
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0
Views
200
admins
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A
If cosec theta + cot theta = p prove that cos theta = p2-1 / p2 + 1
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0
Views
174
admins
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If tan(a+b-c)/tan(a-b+c)=tana/tanb then prove that sin2a+sin2b+sin2c=0
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0
Views
178
admins
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If 2tanA=2tanB, prove that tan(A-B)=(sin2B)/(5-cos2B)
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0
Views
178
admins
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