INTRODUCTION TO TRIGONOMETRY CHAPTER 8 CLASS 10 NCERT EXERCISE 8.1 Q.7 and Q.8
If cot θ = 7/8 Evaluate : (i)( (1+sin θ)(1-sin θ))/((1+cos θ)(1-cos θ)) (ii) cot 2 θ If cosec θ = 2 , find value of (1 )/(tan θ)+( sin θ)/( 1 + cos θ) If 3 cot A = 4, check whether (1-tan 2 A)/(1 +tan2 A) = cos2 A – sin2A or not . (NCERT)
