If `P : Q = tan2A : cosA` and `Q : R=cos2A : sin2A` then `P: R` is

If P:Q= tan 2A: cos A and Q: R= cos 2A: sin 2A, then P:R is _________

If p + r = 2q and 1/q + 1/s = 2/r , then prove that p : q = r : s .

If tan theta = p/q then (p sin theta - q cos theta)/(p sin theta + q cos theta)=

If tan theta = p/q then (p sin theta - q cos theta)/(p sin theta + q cos theta)=

If P - Q - R and d(P,Q) = 2 , d(P,R) = 10 , then find d(Q,R).

The triangle PQR of which the angles P,Q,R satisfy cos P = (sin Q)/(2 sin R ) is :

In DeltaP Q R , right angled at Q, P R+Q R=25cm and P Q=5c m . Determine the values of sin P, cos P and tan P .

In DeltaP Q R , right angled at Q, P R+Q R=25cm and P Q=5c m . Determine the values of sin P, cos P and tan P .