Trigonometric EquationHard
Question
The expression 
is equal to
is equal toOptions
A.0
B.1
C.3
D.sin 4α + cos 6α
Solution
= 3(cos4α + sin4α) - 2(cos6α + sin6α)
= 3(1- 2sin2α cos2α) - 2(1-3sin2α cos2α)
= 3- 6sin2α cos2α - 2 + 6sin2α cos2α = 1
Create a free account to view solution
View Solution FreeMore Trigonometric Equation Questions
The projections of a vector on the three coordinate axis are 6, - 3, 2 respectively. The direction cosines of the vector...If the points (1, 1, λ) and (−3, 0, 1) are equidistant from the plane, 3x + 4y − 12z + 13 = 0, then sat...The maximum distance from origin of a point on the curve x = a sin t - b siny = a cos t - b cos, both a, b > 0 is...In a triangle ABC, ∠B = and ∠C = LetDdivides BC internally in the ration 1 : 3, then is equal to...Value of 4sin 9o sin 21o sin 39o sin 51o sin 69o sin 81osin ...