Answer
Step by step text solution for If arcs of same length in two circles subtend angles of 60^0a n d75^0 at their centers, find the ratios of their radii. by MATHS experts to help you in doubts & scoring excellent marks in Class 11 exams.
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ALLEN-TRIGONOMETRIC RATIOS AND IDENTITIES-All Questions
- If arcs of same length in two circles subtend angles of 60^0a n d75^0 ...
01:57
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- If sintheta+sin^2theta=1, then prove that cos^(12)theta+3cos^(10) thet...
01:55
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- 2(sin^2theta+cos^2theta)-3(sin^4theta+cos^4theta)+1 is equal to a. ...
01:50
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- If sintheta=-1/2a n d\ t a ntheta=1/(sqrt(3))t h e n\ theta s equal t...
01:33
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- Show that sqrt(3)\ cos e c\ 20^0-sec20^0=4.
02:00
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- Prove that: t a n 70^0=t a n 20^0+2t a n 50^0dot
02:08
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- If sin2A= lambda sin 2B prove that (tan(A+B)/tan(A-B))=(lambda+1)/(la...
02:24
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- (sin5theta+sin2theta-sintheta)/(cos5theta+2cos3theta+2cos^2theta+costh...
02:41
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- Prove that: sin 12^0sin 48^0sin 54^0=1/8dot
02:36
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- Prove that (2cos2A+1)/(2cos2A-1)=tan(60^0+A)tan(60^0-A)dot
05:41
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- Prove that :t a n A+tan(60^0+A)+tan(120^0+A)=3t a n3A
03:14
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- sin (67(1)/2)^(@)+cos(67(1)/2)^(@) is equal to
03:17
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- The value of sin 78^0-sin 66^0-sin 42^0+sin6^0 is -1 b. 1//2 c. -1//2 ...
03:20
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- In any triangle A B C ,\ sin A-cos B=cos C ,\ the angle\ B is a.pi...
03:16
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- If A+B+C=(3pi)/2 , then cos2A+cos2B+cos2C is equal to a.1-4cos Acos...
02:20
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- Prove that 5costheta+3cos(theta+pi/3)+3 lies between -4 and 10.
04:11
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- The maximum value of 1+sin(pi/4+theta)+2cos(pi/4-theta) for real value...
01:52
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- Prove that t a n A+2t a n2A+4t a n4A+8cot8A=cot Adot
02:28
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- sum(r=1)^(n-1)cos^2((rpi)/n)
08:12
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- Prove that: (1+sec2theta)(1+sec4theta)(1+sec8theta)(1+sec2^ntheta)=t a...
04:58
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