`2sin A sin B ` बराबर है|

(sec∅ - tan∅)^2 (1 + sin∅)^2 ÷ sin^(2)∅ =? (sec∅ - tan∅)^2 (1 + sin∅)^2 ÷ sin^(2)∅ बराबर है :

sin^2 36^@+ tan^2 60^@+ sec^2 30^@ + sin^2 54^@ is equal to / sin^2 36^@+ tan^2 60^@+ sec^2 30^@ + sin^2 54^@ बराबर है

If cos theta=(2p)/(p^(2)+1) , then sin theta is equal to: यदि cos theta= (2p)/ (p^(2)+ 1) , है तो sin theta बराबर है:

If (1+sin psi)/(1-sin psi)=p^2/q^2 then sec psi is equal to : यदि (1+sin psi)/(1-sin psi)=p^2/q^2 है, तो sec psi किसके बराबर है ?

(sin (AC) + 2sin A + sin (A + C)) / (sin (BC) + 2sin B + sin (B + C)) is

If A+B+C= pi and (sin 2 A + sin 2B + sin 2 C)/(sin A + sin B + sin C ) = lamda sin ((A)/(2)) sin ((B)/(2)) sin ((C )/(2)) , then the value of lamda must be

Show that: sin A + sin B +sin C - sin(A+B+C)=4 sin ((A+B)/2)sin ((B+C)/2)sin ((C+A)/2)

(sin2A + sin2B + sin2C) / (sin A + sin B + sin C) = 8sin ((A) / (2)) sin ((B) / (2)) sin ((C) / (2))

((a^(2) - b^(2) sin A sin B) /( 2 sin ( A- B)))

If A + B + C =pi/2 , prove that : sin^2 A +sin^2 B+sin^2 C= 1-2 sin A sin B sin C .