Question

cot 12 + cot 38 × cot 52 into cot60×cot 78​

Answer 1

Answer:This arrangement can be rearranged as :

(cot12*cot72)(cot38*cot52)cot 60

= {cot12*cot(90-12)}{cot38*cot(90-38) cot 60

= cot 12 * tan 12 * cot 38 * tan 38 *cot 60

= 1*1* cot 60

= cot 60  

= 1/2

Step-by-step explanation: