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Mathematics (11,12)
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Trigonometry
Trigonometry
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A
What is the expansion of cos(A+B+C) in terms of cos?
admins
Jan 28, 2022
Replies
1
Views
414
Feb 6, 2023
Prashant Kumar
P
A
For any triangle ABC prove that Sin B-C/2=B-C/A cos A/
admins
Jan 28, 2022
Replies
0
Views
233
Jan 28, 2022
admins
A
A
If tan^2A = 1+ 2tan^2B then prove that cos^2 B=2 cos^2 A
admins
Jan 28, 2022
Replies
0
Views
259
Jan 28, 2022
admins
A
A
Find the value of this equation, Tan1°+ Tan2°+ ..........Tan89°=
admins
Jan 28, 2022
Replies
0
Views
331
Jan 28, 2022
admins
A
A
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)?
admins
Jan 28, 2022
Replies
0
Views
345
Jan 28, 2022
admins
A
A
What is double angle formula of sine & cosine in terms of tan
admins
Jan 28, 2022
Replies
0
Views
204
Jan 28, 2022
admins
A
A
Prove that .(sinAsinB)/(cosA+cosB)=(2tan(A/2)tan(B/2))/(1-tan^2(A/2)tan^2(B/2))
admins
Jan 28, 2022
Replies
0
Views
200
Jan 28, 2022
admins
A
A
If cosec theta + cot theta = p prove that cos theta = p2-1 / p2 + 1
admins
Jan 28, 2022
Replies
0
Views
174
Jan 28, 2022
admins
A
A
If tan(a+b-c)/tan(a-b+c)=tana/tanb then prove that sin2a+sin2b+sin2c=0
admins
Jan 28, 2022
Replies
0
Views
178
Jan 28, 2022
admins
A
A
If 2tanA=2tanB, prove that tan(A-B)=(sin2B)/(5-cos2B)
admins
Jan 28, 2022
Replies
0
Views
178
Jan 28, 2022
admins
A
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