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(i) tan 48º tan 16º tan 42º tan 74º = 1
(ii) cos36º cos 54º − sin36º sin 54º = 0.
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tan(90-42) ×tan (90-74)×tan 42 ×tan 74=1
cot 42×cot 74×1/cot 42 ×1/cot 74=1
1=1 (these all will be cancelled )
2.cos (90-54)×cos (90-36)-sin 36×sin54=0
(sin 54×sin36) -(sin 36 ×sin 54)=0
0=0
HOPE THE ANSWER HELPS YOU. PLS PLS MARK THE ANSWER AS BRAINLIEST ANSWER.
cot 42×cot 74×1/cot 42 ×1/cot 74=1
1=1 (these all will be cancelled )
2.cos (90-54)×cos (90-36)-sin 36×sin54=0
(sin 54×sin36) -(sin 36 ×sin 54)=0
0=0
HOPE THE ANSWER HELPS YOU. PLS PLS MARK THE ANSWER AS BRAINLIEST ANSWER.
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