Answer
Step by step text solution for Find the value of: cos(pi/8) by MATHS experts to help you in doubts & scoring excellent marks in Class 11 exams.
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JBD PUBLICATION-TRIGNOMETRIC FUNCTIONS-EXAMPLE
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06:04
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03:57
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- Show that:(sin11x sinx+sin7x sin3x)/(cos11x sinx + cos7x sin3x)=tan8x
03:44
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- Prove the following: sin2 x + 2 sin 4x + sin 6x = 4 cos^2 x sin 4x
03:14
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- Find the general solution for each of the following equations: 2cos^2x...
04:20
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- Find the general solution for each of the following equations: 4 sin^2...
05:25
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- Find the general solution of the following equations: sec^2 2x = 1- ta...
04:41
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- Find the general solution of the following trignometric equations: tan...
02:14
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- Find the general solution of the following trignometric equations: tan...
02:35
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- Prove that: (cosx-cosy)^2 +(sinx-siny)^2=4 sin^2frac (x-y)(2)
04:30
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- If sinx=3/5, cosy=-12/13, where x and y both lie in second quadrant, f...
04:53
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- Prove that: (cosx-cosy)^2 +(sinx-siny)^2=4 sin^2frac (x-y)(2)
04:30
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- Show that:sin^2 pi/8 + sin^2 (3pi)/8+sin^2 (5pi)/8+sin^2 (7pi)/8=2
04:54
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- Show that:[cos((3pi)/4)-cos((2pi)/3)]/[cos((3pi)/4)+cos((2pi)/3)]=3-2s...
03:02
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- Prove that:cosA.cos(pi/3-A).cos(pi/3+A)=1/4cos3A
04:30
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- Prove that:tan(x/2)=pmsqrt[(1-cosx)/(1+cosx)]
02:07
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- Find the value of: cos(pi/8)
01:45
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- If cosx=1/2(a+1/a), show that: cos2x=1/2(a^2+1/a^2)
02:35
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- If cosx=1/2(a+1/a), show that: cos3x=1/2(a^3+1/a^3)
03:04
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- Prove that: cos2x cos(x/2)-cos3x cos((9x)/2)=sin5x sin((5x)/2)
04:34
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