Find the value of `sin^2 A` + `cos^2 A` = ??

Find the value of sin^2 30^@ cos^2 45^@ + 4 tan^2 30^@ + (frac(1)(2) sin^2 90^@ - 2 cos^2 90^@ + frac(1)(24) (A) 3 (B) 4 (C) 2 (D) 1

If A=29^@ , find the value of sin^4 A+ cos^4 A + 2 sin^2 A cos^2 A

Find the value of sin ^2 30^@ +cos^@ 45^@ .

Find the value of sin [ arc cos (- 1/2)]

If cot theta =7/8 Find the value of sin^(2) theta +cos^(2) theta .

If sinA=3/5 , where 0^(@)ltA lt 90^(@) , find the values of sin 2A, cos 2A, tan 2A and sin 4A .

Find the value of (3-4 sin ^(2) A)/(4 cos ^(2) A -3) if sec A = (17)/(8).

Find the value of 2sin30^(@)cos30^(@) .