2sin 45 cos 45

Find the value of 4 sin^(2) 60 + 3 tan^(2) 30 - 8 sin 45 .cos 45

Find x if sqrt3 tan 2x = cos 60° + sin 45° cos 45°

Consider the following I. (cot 30^@+1)/(cot30^@ -1) = 2 (cos300^@ +1) II. 2 sin 45^@ cos 45^@ - tan 45^@ cot 45^@ = 0 Which of the above identities is/are correct ?

If y sin 45^0 cos 45^0 = tan^2 45^0 cos^2 30^0 then y =

2sin45^(@)cos45^(@)

2 sin 45^@.cos 45^@ =………

2sin45^@*cos45^@ = …………….

Find the value of the following (i) tan 60^@ xx cos 30^@ (ii) sin 45^@ * cos 45^@ – sin^2 30^@ (iii) 2 sin 45^@* cos 45^@*tan 45^@ (iv) cos 30^@* cos 45^@ – sin 30^@* sin 45^@ (v) tan 30^@* sec 45^@ + tan 60^@* sec 30^@

Find the value of x in each of the following: tanx=sin45°cos45°+sin30° (ii) sqrt(3)tan2x=cos60°+sin45°cos45° (iii) cos2x=cos60°cos30°+sin60°sin30°

Evaluate : [{:(,cos 45^@, sin 30^@),(,sqrt2 cos 0^@, sin 0^@):}] [{:(,sin 45^@, cos 90^@),(,sin 90^@, cot 45^@):}]