`" In "/_\PQR, /_Q=90^(@)/_P=theta^(@)" and "/_R=phi , PR=x+2` Find (i)`(sqrt(x+1))cot phi` (ii) `(sqrt(x^(3)+x^(2)))tan theta" (iii) "cos theta`

26) In Delta ABC,/_A=theta,/_B=90^(@) and /_C=phi If BC=x and AC=(x+2) ,find the values of (i) (sqrt(x+1))cot phi (ii) (sqrt(x^(3)+x^(2)))tan theta (iii) cos theta

23.If cot theta=(2x)/(sqrt(9-4x^(2))),th(i)sin theta+cos theta

If 0^(@)

If "sin" theta+"sin" phi=a and cos theta+cos phi=b find: (i) "sin"(theta+phi) (ii) cos(theta+phi) (iii) cos(theta-phi)

Find the general solution of ( i ) tan theta=(1)/(sqrt(3)) (ii) tan2 theta=sqrt(3)( iii)tan 3 theta=-1

Solve (i) sqrt(3)cos theta+sin theta=sqrt(2)(ii)sqrt(2)sec theta+tan theta=1( iii) cot theta+cos ec theta=sqrt(3)

If tan theta = 1 and sin phi = (1)/(sqrt(2)), and theta, phi in[0,pi/2] , then the value of cos (theta + phi) is

If tan theta = 1 and sin phi = (1)/( sqrt(2)) , then the value of cos (theta + phi) is

If (1+tan theta)(1+tan phi)=2 then theta+phi=

If theta and phi lie in the first quadrant such that sin theta =(8)/(17) "and cos " phi =(12)/(13) find the values of (i) " sin"(theta- phi) " "(ii) " cos " (theta + phi) " " (iii) " tan " (theta - phi)