`sin^2 52 1/2^@-cos^2 7 1/2^@`

Prove that sin^(2)52 1/2-sin^(2)22 1/2 .

(cos^2 3 3^(@)-cos^2 5 7^@)/(sin2 1^@-cos2 1^@)=

(cos^2 3 3^(@)-cos^2 5 7^@)/(sin2 1^@-cos2 1^@)=

P.T (i) sin^2 52""1^@/2-sin^2 22""1^@/2=(sqrt3+1)/(4sqrt2) sin^2 52""1^@/2-sin^2 22""1^@/2=(sqrt3+1)/(4sqrt2)

Evaluate: sin(521/2)^(@) cos(7(1/2))^(@)

Solve 2^(sin^2x) + 5.2^(cos^2x)= 7 .

The value of sin^2 38^@-cos^2 52^@ is : sin^2 38^@-cos^2 52^@ का मान ज्ञात करें ।

The value of (sin^2""7""1/2""+cos^2""7""1/2""^@)-(sin^2""30^@+cos^2""30^@)+(sin^2""7^@+sin^2""83^@) is equal to (a)3 (b) 3""1/2 (c)2 (d)1

Show that sin^2 52^@ + sin^2 38^@=1

Find sin 7 1^@/2, cos 7 1^@/2 and tan 11 1^@/4 .