What is sin2 (3 π) + cos2 (4 π) + tan2 (5π) equal to ?

Answer: (2) 1
Explanation:-
sin²(3 π ) + cos² (4 π ) + tan² (5  π )
= sin² (3 x 180) + cos² (4 x 180) + tan² (5 x 180)
= sin² (360 + 180) + cos² ( 360 + 360 ) + tan² ( 2 x 360 + 180)
= sin² 180 + cos² 360 + tan² 180
= (0)² + (1)² + (0)²
 = 0 + 1 + 0
= 1
Hence, the answer is (2) 1.