hi.....i need some help,,,, if any1 izz gd in trignometry,,,,,,,den pls..........................
- sinQ (1+tanQ) + cosQ (1+cotQ) = secQ + cosecQ
- cosQ / 1-tanQ - sin2Q / cosQ-sinQ = sinQ + cosQ
- secQ (1-sinQ) (secQ + tanQ) = 1
- 2sec2Q - sec4Q - 2cosec2Q + cosec4Q = cot4Q - tan4Q
2. LHS = CosQ / 1- tanQ - sin2Q / CosQ - SinQ
= cosQ / 1 - (sinQ/CosQ) - Sin2Q / CosQ - SinQ
= cosQ / (cosQ-sinQ/CosQ) - Sin2Q / CosQ - SinQ
= Cos2Q / CosQ - SinQ - Sin2Q / CosQ - SinQ
= Cos2Q - Sin2Q / CosQ - SinQ ( by appliying formula a2 - b2 = (a+b)(a-b) )
= (cosQ + sinQ)(CosQ - SinQ)/ CosQ - SinQ
= cut out both d values...
= cosQ + sinQ
= RHS