Question

( 2^{sin ^{2} x}+52^{1-sin ^{2} x}=7 )
( sin ^{2} x=1 quad sin ^{2} x=log _{2} 5 )
not possible as ( sin ^{2} x operatorname{sen} t )
( x=pm pi / 2 quad ) me gratu than 1
( therefore quad ) no. ( quad phi ) sibthin ( =2 )

# .22 Number of solutions of the equation 2sin” x + 5.2.008” x = 7 in the interval [-, 1) is (A) 4 (B) 2 (C) 6 (D) O

Solution