" 19) "sin(45+A)-cos(45-A)=?

2sin45^(@)cos45^(@)

Show that sin(45^@+A)cos(45^@-B)+cos(45^@+A)cos(45^@-B)=cos(A-B)

Prove the following : cos(A+B)+sin(A-B) 2sin( 45^@ +A)cos( 45^@ +B)

The value of "sin"(45^(@)+ theta)-"cos(45^(@) - theta) is (i) 2costheta (ii) 2sintheta (iii) 1 (iv) 0

2sin45cos45

Find the value of sin (45^@+theta)-cos (45^@-theta)

sin^(2)45^(@)+cos^(2)45^(@)=

The value of sin (45° + θ) – cos (45° – θ) is (A) 2 cos θ (B) 2 sin θ (C) 1 (D) 0

ABC is an isosceles right-angled triangle. Assuming AB = BC = x, find the value of each of the following trigonometric ratios : (i) sin45^(@) (ii) cos45^(@) (iii) tan45^(@)

Using the trigonometric table and evalute (a) sin^(2)45^(@)+cos^(2)45^(@) (b) sec^(2)30^(@)-tan^(2)30^(@)