Question
If cos4 p - sin4 p =
src="https://static.ixambee.com/public/images/quesimg/Question Bank/Quantitative Aptitude/Trigonometry/86670_5335457.gif" alt="" /> , then the value of 2 cos2 p - 1 isSolution
cos4 p - sin4 p = 
(cos2 p + sin2 p)(cos2 p - sin2 p) = (cos2 p - sin2 p) = cos2 p - (1-cos2 p) = 2 cos2 p-1 =
More Trigonometry Questions
What will come in place of the question mark (?) in the following series?
?, 65, 37, 73, 29, 81
What will come in place of the question mark (?) in the following series?
77, 198, 342, 511, 707, ?
15, 23, 30, 36, 41, ?
What will come in place of the question mark (?) in the following series?
1458, ?, 162, 54, 18, 6
14, 17, 23, 32, ?, 59
60, 100, 160, 240, ?, 460
69, 35.5, 39.5, 68.25, 152.5, ?
66, 17, 81, ?, 100, -21Â
1, 7, 37, 187, 937, ?
612, 487,?, 396, 388, 387
Relevant for Exams:
