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(i) "tan", cot (ii) cos , sec.**Explain Trignometric Ratios or Function with graph .**

**Trigonometric ratios are same for same angle**

**Relation between trigonometric ratios**

**State Fundamental Trigonometric identities and also prove that identities .**

**Prove related problems - Type 1 - prove the following identities `(1) sin^8theta-cos^8theta=(sin^2theta-cos^2theta)(1-2sin^2thetacos^2theta (2) cot^2 theta+cot^4theta=cosec^4theta-cosec^2theta`**

**Prove related problems - Type 2-(1) If `cos theta+sintheta=sqrt2costheta` prove that `cos theta-sin theta=sqrt2 sin theta`(2) Given that `(1+cos alpha)(1+cos beta)(1+cos gamma)=(1-cosalpha)(1-cosbeta)(1-cosgamma)` Show that the value of each member of the equality is `sinalphasinbetasingamma`**

**Explain Signs of trigonometric function with graph .**

**find variation in the values of all trignometric functions in different quadrants?**

**Calculation of trigonometric values if 1 value is given (1) If `sin theta= 3/5` then find the value of all trigonometric functions**

**Represent angle (-x) in terms of x**