If
Cosec A+ Cosec^2 A = 1 then the value of
Cot^12 A - 3 Cot^10 A + 3 cot^8 A -Cot^4 A
Answers
Step-by-step explanation:
22x y z+ = 4. sin 3x + cos 2x + 2 = 0 5. cos 4x + sin 5x = 2. TYPE 9 A trigonometrical equation involving with exponential, logarithmic and modulii terms: Rule: Whenever equation contains power term, then we should use the following method. 1. Equate the base if possible 2. If it is not possible to equate the base, take log of both the sides and make its R.H.S is zero, then we proceed further. Ex.-1 Find the values of x in -( )p p, which satisfy the equation. 8 641 2 3 4 5+ + + + + + \u2022 =cos cos cos cos cos ..........x x x x x to Soln. The given equation can be written as 8 81 2 2 3 4 5+ + + + + + \u2022 =cos cos cos cos cos ..........x x x x x to \ufb01 1 2 3 4+ + + + + \u2022cos cos cos cos ..x x x x to = 2 \ufb01 1 1- cos x = 2 \ufb01 cos x = ± 1 2 When cos x = 1 2 \ufb01 cos cosx = Ê ËÁ \u2c6 ¯\u2dc p 3 \ufb01 x n n Z= ± \u1522 3 p p , When cos cosx = - = Ê ËÁ \u2c6 ¯\u2dc