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ICSE-COMPOUND AND MULTIPLE ANGLES -CHEPTER TEST
- Show that tan 75^(@) = (sqrt3) +(1 )/( sqrt3 -1) = 2 + sqrt3. Hence de...
06:17
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- Prove that sin (n+1) x sin (n +2) x + cos (n +1) x cos (n +2) x = cos ...
02:28
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- if A+ B + C = pi, and cos A = cos B cos C, show that 2 cot B cot C=1.
03:15
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- Show that (sin (alpha + beta))/( sin (alpha + beta)) = 2, given that ...
03:38
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- Show that ( cos 10^(@) + sin 10 ^(@))/( cos 10^(@) - sin 10 ^(@)) = ta...
03:24
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- If sin 2 A = 4/5, find the value of tan A, (0^(@) le A le (pi)/(3))
02:50
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- Express cot A in terms of cos 2 A
02:09
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- Write cos 4 theta in terms of cos theta.
02:16
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- A positive acute angle is divided into two parts whose tangents are 1/...
01:39
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- Show that cos 10^(@) + cos 110^(@) + cos 130^(@) = 0
01:41
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- Show that (sin 5 A + 2 sin 8A + sin 11 A)/( sin 8A + 2 sin 11 A + sin ...
02:43
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- Show that (1)/(2 sin 10^(@)) - 2 sin 70^(@) =1.
03:53
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- Show that sin 19^(@) + sin 41^(@) + sin 83^(@) = sin 23 ^(@) + sin 37^...
03:50
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- If sin A = (1)/(sqrt3) and sin B = (1)/(sqrt5) find the value of tan...
05:38
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- If sin theta = n sin ( theta + 2 alpha ) , show that ( n -1) tan (the...
04:20
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- If tan "" (alpha )/(2) and tan "" (beta)/( 2) are the roots of the eq...
05:00
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- Prove that ((cos A + cos B)/( sin A - sin B )) ^(n) + ((sin A + sin B ...
05:35
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- Find sin ""(x)/(2), cos "" (x)/(2) and tan "" (x)/(2) in each of the c...
06:34
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- Find sin ""(x)/(2), cos "" (x)/(2) and tan "" (x)/(2) in each of the c...
06:14
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- Prove that cos 6x = 32 cos ^(6) x - 48 cos ^(4) x + 18 cos ^(2) x -1.
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