" ((iii) "[sin2A=2sin A" is true when "A=],[(A)quad 0^(@)]quad [" (B) "1," (C) "sin45^(@)],[" (B) "30^(@)," (C) "45^(@)]

sin2A=2sin A is true when A=0o(b)300 (c) 45o(d)60o

sin2A=2sinA is true when A= (a) 0^@ (b) 30^@ (c) 45^@ (d) 60^@

f "2sin^(2)beta-cos^(2)beta=2",then "beta" is (a) "0^(@)" (b) "90^(@)" (c) "45^(@)" (d) "30^(@)"

sin^2 17. 5^(@)+sin^2 72. 5^(@) is equal to............ A) cos ^(2) 90^(@) B) tan ^(2) 45^(@) C) cos ^(2) 30^(@) D) sin ^(2) 45^(@)

If 1^(@) =0.018^(c) , then sin^(2) (45 ^(@) 2')~~ …

The value of a sin 0^(@) + b cos 90^(@)+ c tan 45^(@) is

cos (A +B) + sin (A -B) = 2 sin (45 ^(@) + A) cos ( 45 ^(@) + B).

Evaluate cos45^(@)cos30^(@)+sin45^(@)sin30^(@) .

Evaluate cos45^(@)cos30^(@)+sin45^(@)sin30^(@) .

Find the values of the following :- {:((a)sin(-30^(@)),(b)cos(-45^(@))),((c)sin(-60^(@)),(d)tan(-45^(@))):}